android - 2 番目のアクティビティが開始されず、アプリが強制終了します: 致命的な例外メイン。java.lang.ClassCastException:android.app.Application

Question

インストールされたアプリのリストを提供するアプリを作成しようとしています。アイテムがクリックされると、インストールされたアプリに必要な権限を示す別のアクティビティが開始されます。インストールされているアプリケーションのリストを取得しましたが、新しいアクティビティを開始する代わりに任意のアプリをクリックすると、アプリケーションが強制終了します。

主な活動

package com.example.appslist;

import java.util.List;
import com.example.appslist.adapter.ApkAdapter;
import com.example.appslist.app.AppData;
import android.os.Bundle;
import android.app.Activity;
import android.content.Intent;
import android.content.pm.PackageInfo;
import android.content.pm.PackageManager;
import android.view.View;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.ListView;


public class ApkListActivity extends Activity implements OnItemClickListener {

    PackageManager packageManager;


    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);


        packageManager = getPackageManager();
        List<PackageInfo> packageList = packageManager
                .getInstalledPackages(PackageManager.GET_PERMISSIONS);

        ListView mylistview= (ListView) findViewById(android.R.id.list);
        mylistview.setAdapter(new ApkAdapter(this, packageList, packageManager));
        mylistview.setOnItemClickListener(this);
        }

    @Override
    public void onItemClick(AdapterView<?> parent, View view, int position,
            long row) {

        PackageInfo packageInfo = (PackageInfo) parent
                .getItemAtPosition(position);
        AppData appData = (AppData) getApplication();
        appData.setPackageInfo(packageInfo);

        Intent appInfo = new Intent(ApkListActivity.this, ApkInfo.class);
        startActivity(appInfo);
    }
}

ApkInfo.java

package com.example.appslist;

import android.os.Bundle;
import android.app.Activity;
import com.example.appslist.app.AppData;
import android.content.pm.FeatureInfo;
import android.content.pm.PackageInfo;
import android.widget.TextView;

public class ApkInfo extends Activity {

  TextView appLabel, packageName, version, features;
    TextView permissions, andVersion,path;
    PackageInfo packageInfo;

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.apkinfo);

        findViewsById();

        AppData appData = (AppData) getApplicationContext();
        packageInfo = appData.getPackageInfo();

        setValues();

    }

    private void findViewsById() {
        appLabel = (TextView) findViewById(R.id.applabel);
        packageName = (TextView) findViewById(R.id.package_name);
        version = (TextView) findViewById(R.id.version_name);
        features = (TextView) findViewById(R.id.req_feature);
        permissions = (TextView) findViewById(R.id.req_permission);
        andVersion = (TextView) findViewById(R.id.andversion);
        path = (TextView) findViewById(R.id.path);

    }

    private void setValues() {
        // APP name
        appLabel.setText(getPackageManager().getApplicationLabel(
                packageInfo.applicationInfo));

        // package name
        packageName.setText(packageInfo.packageName);

        // version name
        version.setText(packageInfo.versionName);

        // target version
        andVersion.setText(Integer
                .toString(packageInfo.applicationInfo.targetSdkVersion));

        // path
        path.setText(packageInfo.applicationInfo.sourceDir);


        // features
        if (packageInfo.reqFeatures != null)
            features.setText(getFeatures(packageInfo.reqFeatures));
        else
            features.setText("-");

        // uses-permission
        if (packageInfo.requestedPermissions != null)
            permissions
                    .setText(getPermissions(packageInfo.requestedPermissions));
        else
            permissions.setText("-");
    }

    // Convert string array to comma separated string
    private String getPermissions(String[] requestedPermissions) {
        String permission = "";
        for (int i = 0; i < requestedPermissions.length; i++) {
            permission = permission + requestedPermissions[i] + ",\n";
        }
        return permission;
    }

    // Convert string array to comma separated string
    private String getFeatures(FeatureInfo[] reqFeatures) {
        String features = "";
        for (int i = 0; i < reqFeatures.length; i++) {
            features = features + reqFeatures[i] + ",\n";
        }
        return features;
    }
}

AppData クラス

package com.example.appslist.app;

import android.app.Application;
import android.content.pm.PackageInfo;

public class AppData extends Application {

    PackageInfo packageInfo;

    public PackageInfo getPackageInfo() {
        return packageInfo;
    }

    public void setPackageInfo(PackageInfo packageInfo) {
        this.packageInfo = packageInfo;
    }
}

マニフェストに AppData を登録しようとしましたが、バンドルを使用しようとしましたが、強制終了します。助けてください。

マニフェストファイル

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.example.appslist"
    android:versionCode="1"
    android:versionName="1.0" >

    <uses-sdk
        android:minSdkVersion="8"
        android:targetSdkVersion="17" />

    <application
        android:allowBackup="true"
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name"
        android:theme="@style/AppTheme" 
    >

        <activity
            android:name="com.example.appslist.ApkListActivity"
            android:label="@string/app_name" >
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
        <activity
            android:name=".ApkInfo"
            android:label="@string/title_activity_apk_info" >
        </activity>
    </application>



</manifest>

LogCat はこちら

04-09 12:17:47.305: E/asset(5752): MAS: getAppPckgAndVerCode package: com.example.appslist === version 1
04-09 12:17:47.329: D/dalvikvm(5752): Trying to load lib lib_glossary.so 0x0
04-09 12:17:47.329: I/dalvikvm(5752): Unable to dlopen(lib_glossary.so): Cannot load library: load_library[1083]: Library 'lib_glossary.so' not found
04-09 12:17:47.329: E/MBGlossaryManager(5752): lib_glossary.so can't be loaded
04-09 12:17:47.469: E/asset(5752): MAS: getAppPckgAndVerCode package: com.google.android.location === version 8
04-09 12:17:47.469: E/asset(5752): MAS: getAppPckgAndVerCode package: com.android.launcher === version 8
04-09 12:17:47.477: E/asset(5752): MAS: getAppPckgAndVerCode package: com.android.defcontainer === version 8
04-09 12:17:47.477: E/asset(5752): MAS: getAppPckgAndVerCode package: com.navngo.igo.javaclient === version 148360
04-09 12:17:47.485: E/asset(5752): MAS: getAppPckgAndVerCode package: com.android.contacts === version 8
04-09 12:17:47.493: E/asset(5752): MAS: getAppPckgAndVerCode package: com.example.backgroundapp === version 1
04-09 12:17:47.493: E/asset(5752): MAS: getAppPckgAndVerCode package: com.arcsoft.photoworkshop === version 5
04-09 12:17:47.548: D/dalvikvm(5752): GC_EXTERNAL_ALLOC freed 934 objects / 65512 bytes in 49ms
04-09 12:17:47.555: E/asset(5752): MAS: getAppPckgAndVerCode package: com.android.phone === version 8
04-09 12:17:47.563: E/asset(5752): MAS: getAppPckgAndVerCode package: com.android.calculator2 === version 8
04-09 12:17:47.563: E/asset(5752): MAS: getAppPckgAndVerCode package: com.android.htmlviewer === version 8
04-09 12:17:47.563: E/asset(5752): MAS: getAppPckgAndVerCode package: com.example.myfirstapp === version 1
04-09 12:17:47.571: E/asset(5752): MAS: getAppPckgAndVerCode package: com.android.providers.calendar === version 8
04-09 12:17:47.571: E/asset(5752): MAS: getAppPckgAndVerCode package: com.android.bluetooth === version 8
04-09 12:17:47.571: E/asset(5752): MAS: getAppPckgAndVerCode package: com.example.sessionmanagement === version 1
04-09 12:17:47.579: E/asset(5752): MAS: getAppPckgAndVerCode package: com.google.android.location === version 8
04-09 12:17:47.579: E/asset(5752): MAS: getAppPckgAndVerCode package: com.android.launcher === version 8
04-09 12:17:47.587: E/asset(5752): MAS: getAppPckgAndVerCode package: com.android.defcontainer === version 8
04-09 12:17:47.587: E/asset(5752): MAS: getAppPckgAndVerCode package: com.navngo.igo.javaclient === version 148360
04-09 12:17:47.594: E/asset(5752): MAS: getAppPckgAndVerCode package: com.android.contacts === version 8
04-09 12:17:47.641: E/asset(5752): MAS: getAppPckgAndVerCode package: com.example.backgroundapp === version 1
04-09 12:17:47.782: W/IInputConnectionWrapper(5752): showStatusIcon on inactive InputConnection
04-09 12:17:47.782: W/IInputConnectionWrapper(5752): clearMetaKeyStates on inactive InputConnection
04-09 12:17:49.704: D/AndroidRuntime(5752): Shutting down VM
04-09 12:17:49.704: W/dalvikvm(5752): threadid=1: thread exiting with uncaught exception (group=0x400207e0)
04-09 12:17:49.719: E/AndroidRuntime(5752): FATAL EXCEPTION: main
04-09 12:17:49.719: E/AndroidRuntime(5752): java.lang.ClassCastException: android.app.Application
04-09 12:17:49.719: E/AndroidRuntime(5752):     at com.example.appslist.ApkListActivity.onItemClick(ApkListActivity.java:42)
04-09 12:17:49.719: E/AndroidRuntime(5752):     at android.widget.AdapterView.performItemClick(AdapterView.java:284)
04-09 12:17:49.719: E/AndroidRuntime(5752):     at android.widget.ListView.performItemClick(ListView.java:3444)
04-09 12:17:49.719: E/AndroidRuntime(5752):     at android.widget.AbsListView$PerformClick.run(AbsListView.java:1696)
04-09 12:17:49.719: E/AndroidRuntime(5752):     at android.os.Handler.handleCallback(Handler.java:587)
04-09 12:17:49.719: E/AndroidRuntime(5752):     at android.os.Handler.dispatchMessage(Handler.java:92)
04-09 12:17:49.719: E/AndroidRuntime(5752):     at android.os.Looper.loop(Looper.java:143)
04-09 12:17:49.719: E/AndroidRuntime(5752):     at android.app.ActivityThread.main(ActivityThread.java:4717)
04-09 12:17:49.719: E/AndroidRuntime(5752):     at java.lang.reflect.Method.invokeNative(Native Method)
04-09 12:17:49.719: E/AndroidRuntime(5752):     at java.lang.reflect.Method.invoke(Method.java:521)
04-09 12:17:49.719: E/AndroidRuntime(5752):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:858)
04-09 12:17:49.719: E/AndroidRuntime(5752):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616)
04-09 12:17:49.719: E/AndroidRuntime(5752):     at dalvik.system.NativeStart.main(Native Method)
04-09 12:17:51.118: I/Process(5752): Sending signal. PID: 5752 SIG: 9
04-09 12:24:48.087: E/asset(5827): MAS: getAppPckgAndVerCode package: com.example.appslist === version 1
04-09 12:24:48.102: D/dalvikvm(5827): Trying to load lib lib_glossary.so 0x0
04-09 12:24:48.110: I/dalvikvm(5827): Unable to dlopen(lib_glossary.so): Cannot load library: load_library[1083]: Library 'lib_glossary.so' not found
04-09 12:24:48.110: E/MBGlossaryManager(5827): lib_glossary.so can't be loaded
04-09 12:24:48.212: E/asset(5827): MAS: getAppPckgAndVerCode package: com.google.android.location === version 8
04-09 12:24:48.219: E/asset(5827): MAS: getAppPckgAndVerCode package: com.android.launcher === version 8
04-09 12:24:48.219: E/asset(5827): MAS: getAppPckgAndVerCode package: com.android.defcontainer === version 8
04-09 12:24:48.219: E/asset(5827): MAS: getAppPckgAndVerCode package: com.navngo.igo.javaclient === version 148360
04-09 12:24:48.227: E/asset(5827): MAS: getAppPckgAndVerCode package: com.android.contacts === version 8
04-09 12:24:48.235: E/asset(5827): MAS: getAppPckgAndVerCode package: com.example.backgroundapp === version 1
04-09 12:24:48.235: E/asset(5827): MAS: getAppPckgAndVerCode package: com.arcsoft.photoworkshop === version 5
04-09 12:24:48.298: D/dalvikvm(5827): GC_EXTERNAL_ALLOC freed 971 objects / 66752 bytes in 58ms
04-09 12:24:48.305: E/asset(5827): MAS: getAppPckgAndVerCode package: com.android.phone === version 8
04-09 12:24:48.313: E/asset(5827): MAS: getAppPckgAndVerCode package: com.android.calculator2 === version 8
04-09 12:24:48.313: E/asset(5827): MAS: getAppPckgAndVerCode package: com.android.htmlviewer === version 8
04-09 12:24:48.313: E/asset(5827): MAS: getAppPckgAndVerCode package: com.example.myfirstapp === version 1
04-09 12:24:48.321: E/asset(5827): MAS: getAppPckgAndVerCode package: com.android.providers.calendar === version 8
04-09 12:24:48.321: E/asset(5827): MAS: getAppPckgAndVerCode package: com.android.bluetooth === version 8
04-09 12:24:48.329: E/asset(5827): MAS: getAppPckgAndVerCode package: com.example.sessionmanagement === version 1
04-09 12:24:48.329: E/asset(5827): MAS: getAppPckgAndVerCode package: com.google.android.location === version 8
04-09 12:24:48.329: E/asset(5827): MAS: getAppPckgAndVerCode package: com.android.launcher === version 8
04-09 12:24:48.337: E/asset(5827): MAS: getAppPckgAndVerCode package: com.android.defcontainer === version 8
04-09 12:24:48.337: E/asset(5827): MAS: getAppPckgAndVerCode package: com.navngo.igo.javaclient === version 148360
04-09 12:24:48.344: E/asset(5827): MAS: getAppPckgAndVerCode package: com.android.contacts === version 8
04-09 12:24:48.391: E/asset(5827): MAS: getAppPckgAndVerCode package: com.example.backgroundapp === version 1
04-09 12:24:49.805: D/AndroidRuntime(5827): Shutting down VM
04-09 12:24:49.805: W/dalvikvm(5827): threadid=1: thread exiting with uncaught exception (group=0x400207e0)
04-09 12:24:49.821: E/AndroidRuntime(5827): FATAL EXCEPTION: main
04-09 12:24:49.821: E/AndroidRuntime(5827): java.lang.ClassCastException: android.app.Application
04-09 12:24:49.821: E/AndroidRuntime(5827):     at com.example.appslist.ApkListActivity.onItemClick(ApkListActivity.java:42)
04-09 12:24:49.821: E/AndroidRuntime(5827):     at android.widget.AdapterView.performItemClick(AdapterView.java:284)
04-09 12:24:49.821: E/AndroidRuntime(5827):     at android.widget.ListView.performItemClick(ListView.java:3444)
04-09 12:24:49.821: E/AndroidRuntime(5827):     at android.widget.AbsListView$PerformClick.run(AbsListView.java:1696)
04-09 12:24:49.821: E/AndroidRuntime(5827):     at android.os.Handler.handleCallback(Handler.java:587)
04-09 12:24:49.821: E/AndroidRuntime(5827):     at android.os.Handler.dispatchMessage(Handler.java:92)
04-09 12:24:49.821: E/AndroidRuntime(5827):     at android.os.Looper.loop(Looper.java:143)
04-09 12:24:49.821: E/AndroidRuntime(5827):     at android.app.ActivityThread.main(ActivityThread.java:4717)
04-09 12:24:49.821: E/AndroidRuntime(5827):     at java.lang.reflect.Method.invokeNative(Native Method)
04-09 12:24:49.821: E/AndroidRuntime(5827):     at java.lang.reflect.Method.invoke(Method.java:521)
04-09 12:24:49.821: E/AndroidRuntime(5827):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:858)
04-09 12:24:49.821: E/AndroidRuntime(5827):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616)
04-09 12:24:49.821: E/AndroidRuntime(5827):     at dalvik.system.NativeStart.main(Native Method)
04-09 12:24:51.688: I/Process(5827): Sending signal. PID: 5827 SIG: 9
04-09 12:24:55.165: E/asset(5835): MAS: getAppPckgAndVerCode package: com.example.appslist === version 1
04-09 12:24:55.188: D/dalvikvm(5835): Trying to load lib lib_glossary.so 0x0
04-09 12:24:55.188: I/dalvikvm(5835): Unable to dlopen(lib_glossary.so): Cannot load library: load_library[1083]: Library 'lib_glossary.so' not found
04-09 12:24:55.188: E/MBGlossaryManager(5835): lib_glossary.so can't be loaded
04-09 12:24:55.313: E/asset(5835): MAS: getAppPckgAndVerCode package: com.google.android.location === version 8
04-09 12:24:55.321: E/asset(5835): MAS: getAppPckgAndVerCode package: com.android.launcher === version 8
04-09 12:24:55.329: E/asset(5835): MAS: getAppPckgAndVerCode package: com.android.defcontainer === version 8
04-09 12:24:55.329: E/asset(5835): MAS: getAppPckgAndVerCode package: com.navngo.igo.javaclient === version 148360
04-09 12:24:55.337: E/asset(5835): MAS: getAppPckgAndVerCode package: com.android.contacts === version 8
04-09 12:24:55.337: E/asset(5835): MAS: getAppPckgAndVerCode package: com.example.backgroundapp === version 1
04-09 12:24:55.344: E/asset(5835): MAS: getAppPckgAndVerCode package: com.arcsoft.photoworkshop === version 5
04-09 12:24:55.391: D/dalvikvm(5835): GC_EXTERNAL_ALLOC freed 993 objects / 67608 bytes in 49ms
04-09 12:24:55.407: E/asset(5835): MAS: getAppPckgAndVerCode package: com.android.phone === version 8
04-09 12:24:55.415: E/asset(5835): MAS: getAppPckgAndVerCode package: com.android.calculator2 === version 8
04-09 12:24:55.415: E/asset(5835): MAS: getAppPckgAndVerCode package: com.android.htmlviewer === version 8
04-09 12:24:55.415: E/asset(5835): MAS: getAppPckgAndVerCode package: com.example.myfirstapp === version 1
04-09 12:24:55.423: E/asset(5835): MAS: getAppPckgAndVerCode package: com.android.providers.calendar === version 8
04-09 12:24:55.423: E/asset(5835): MAS: getAppPckgAndVerCode package: com.android.bluetooth === version 8
04-09 12:24:55.423: E/asset(5835): MAS: getAppPckgAndVerCode package: com.example.sessionmanagement === version 1
04-09 12:24:55.430: E/asset(5835): MAS: getAppPckgAndVerCode package: com.google.android.location === version 8
04-09 12:24:55.430: E/asset(5835): MAS: getAppPckgAndVerCode package: com.android.launcher === version 8
04-09 12:24:55.438: E/asset(5835): MAS: getAppPckgAndVerCode package: com.android.defcontainer === version 8
04-09 12:24:55.438: E/asset(5835): MAS: getAppPckgAndVerCode package: com.navngo.igo.javaclient === version 148360
04-09 12:24:55.446: E/asset(5835): MAS: getAppPckgAndVerCode package: com.android.contacts === version 8
04-09 12:24:55.493: E/asset(5835): MAS: getAppPckgAndVerCode package: com.example.backgroundapp === version 1
04-09 12:24:56.641: D/AndroidRuntime(5835): Shutting down VM
04-09 12:24:56.641: W/dalvikvm(5835): threadid=1: thread exiting with uncaught exception (group=0x400207e0)
04-09 12:24:56.657: E/AndroidRuntime(5835): FATAL EXCEPTION: main
04-09 12:24:56.657: E/AndroidRuntime(5835): java.lang.ClassCastException: android.app.Application
04-09 12:24:56.657: E/AndroidRuntime(5835):     at com.example.appslist.ApkListActivity.onItemClick(ApkListActivity.java:42)
04-09 12:24:56.657: E/AndroidRuntime(5835):     at android.widget.AdapterView.performItemClick(AdapterView.java:284)
04-09 12:24:56.657: E/AndroidRuntime(5835):     at android.widget.ListView.performItemClick(ListView.java:3444)
04-09 12:24:56.657: E/AndroidRuntime(5835):     at android.widget.AbsListView$PerformClick.run(AbsListView.java:1696)
04-09 12:24:56.657: E/AndroidRuntime(5835):     at android.os.Handler.handleCallback(Handler.java:587)
04-09 12:24:56.657: E/AndroidRuntime(5835):     at android.os.Handler.dispatchMessage(Handler.java:92)
04-09 12:24:56.657: E/AndroidRuntime(5835):     at android.os.Looper.loop(Looper.java:143)
04-09 12:24:56.657: E/AndroidRuntime(5835):     at android.app.ActivityThread.main(ActivityThread.java:4717)
04-09 12:24:56.657: E/AndroidRuntime(5835):     at java.lang.reflect.Method.invokeNative(Native Method)
04-09 12:24:56.657: E/AndroidRuntime(5835):     at java.lang.reflect.Method.invoke(Method.java:521)
04-09 12:24:56.657: E/AndroidRuntime(5835):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:858)
04-09 12:24:56.657: E/AndroidRuntime(5835):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616)
04-09 12:24:56.657: E/AndroidRuntime(5835):     at dalvik.system.NativeStart.main(Native Method)
04-09 12:24:58.040: I/Process(5835): Sending signal. PID: 5835 SIG: 9
04-09 12:39:54.556: I/Process(5930): Sending signal. PID: 5930 SIG: 9
04-09 12:43:51.244: E/asset(5972): MAS: getAppPckgAndVerCode package: com.example.appslist === version 1
04-09 12:43:51.283: D/dalvikvm(5972): Trying to load lib lib_glossary.so 0x0
04-09 12:43:51.291: I/dalvikvm(5972): Unable to dlopen(lib_glossary.so): Cannot load library: load_library[1083]: Library 'lib_glossary.so' not found
04-09 12:43:51.291: E/MBGlossaryManager(5972): lib_glossary.so can't be loaded
04-09 12:43:51.494: E/asset(5972): MAS: getAppPckgAndVerCode package: com.google.android.location === version 8
04-09 12:43:51.494: E/asset(5972): MAS: getAppPckgAndVerCode package: com.android.launcher === version 8
04-09 12:43:51.502: E/asset(5972): MAS: getAppPckgAndVerCode package: com.android.defcontainer === version 8
04-09 12:43:51.509: E/asset(5972): MAS: getAppPckgAndVerCode package: com.navngo.igo.javaclient === version 148360
04-09 12:43:51.509: E/asset(5972): MAS: getAppPckgAndVerCode package: com.android.contacts === version 8
04-09 12:43:51.517: E/asset(5972): MAS: getAppPckgAndVerCode package: com.example.backgroundapp === version 1
04-09 12:43:51.517: E/asset(5972): MAS: getAppPckgAndVerCode package: com.arcsoft.photoworkshop === version 5
04-09 12:43:51.580: D/dalvikvm(5972): GC_EXTERNAL_ALLOC freed 1059 objects / 70176 bytes in 57ms
04-09 12:43:51.588: E/asset(5972): MAS: getAppPckgAndVerCode package: com.android.phone === version 8
04-09 12:43:51.595: E/asset(5972): MAS: getAppPckgAndVerCode package: com.android.calculator2 === version 8
04-09 12:43:51.595: E/asset(5972): MAS: getAppPckgAndVerCode package: com.android.htmlviewer === version 8
04-09 12:43:51.595: E/asset(5972): MAS: getAppPckgAndVerCode package: com.example.myfirstapp === version 1
04-09 12:43:51.603: E/asset(5972): MAS: getAppPckgAndVerCode package: com.android.providers.calendar === version 8
04-09 12:43:51.603: E/asset(5972): MAS: getAppPckgAndVerCode package: com.android.bluetooth === version 8
04-09 12:43:51.611: E/asset(5972): MAS: getAppPckgAndVerCode package: com.example.sessionmanagement === version 1
04-09 12:43:51.611: E/asset(5972): MAS: getAppPckgAndVerCode package: com.google.android.location === version 8
04-09 12:43:51.619: E/asset(5972): MAS: getAppPckgAndVerCode package: com.android.launcher === version 8
04-09 12:43:51.619: E/asset(5972): MAS: getAppPckgAndVerCode package: com.android.defcontainer === version 8
04-09 12:43:51.619: E/asset(5972): MAS: getAppPckgAndVerCode package: com.navngo.igo.javaclient === version 148360
04-09 12:43:51.627: E/asset(5972): MAS: getAppPckgAndVerCode package: com.android.contacts === version 8
04-09 12:43:51.673: E/asset(5972): MAS: getAppPckgAndVerCode package: com.example.backgroundapp === version 1
04-09 12:43:56.166: D/AndroidRuntime(5972): Shutting down VM
04-09 12:43:56.166: W/dalvikvm(5972): threadid=1: thread exiting with uncaught exception (group=0x400207e0)
04-09 12:43:56.189: E/AndroidRuntime(5972): FATAL EXCEPTION: main
04-09 12:43:56.189: E/AndroidRuntime(5972): java.lang.ClassCastException: android.app.Application
04-09 12:43:56.189: E/AndroidRuntime(5972):     at com.example.appslist.ApkListActivity.onItemClick(ApkListActivity.java:43)
04-09 12:43:56.189: E/AndroidRuntime(5972):     at android.widget.AdapterView.performItemClick(AdapterView.java:284)
04-09 12:43:56.189: E/AndroidRuntime(5972):     at android.widget.ListView.performItemClick(ListView.java:3444)
04-09 12:43:56.189: E/AndroidRuntime(5972):     at android.widget.AbsListView$PerformClick.run(AbsListView.java:1696)
04-09 12:43:56.189: E/AndroidRuntime(5972):     at android.os.Handler.handleCallback(Handler.java:587)
04-09 12:43:56.189: E/AndroidRuntime(5972):     at android.os.Handler.dispatchMessage(Handler.java:92)
04-09 12:43:56.189: E/AndroidRuntime(5972):     at android.os.Looper.loop(Looper.java:143)
04-09 12:43:56.189: E/AndroidRuntime(5972):     at android.app.ActivityThread.main(ActivityThread.java:4717)
04-09 12:43:56.189: E/AndroidRuntime(5972):     at java.lang.reflect.Method.invokeNative(Native Method)
04-09 12:43:56.189: E/AndroidRuntime(5972):     at java.lang.reflect.Method.invoke(Method.java:521)
04-09 12:43:56.189: E/AndroidRuntime(5972):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:858)
04-09 12:43:56.189: E/AndroidRuntime(5972):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616)
04-09 12:43:56.189: E/AndroidRuntime(5972):     at dalvik.system.NativeStart.main(Native Method)
04-09 12:43:57.486: I/Process(5972): Sending signal. PID: 5972 SIG: 9

score 2 · Accepted Answer

If you read the error log carefully, you'll see what your problem is. It's on line

AppData appData = (AppData) getApplication();

あなたのonItemClick方法の。 getApplicationメソッドは、クラスcom.android.Applicationにキャストしようとしているを返しますがAppData、のインスタンスではありませんAppData。

のすべてのインスタンスはAppDataのインスタンスでもありますがApplication、逆は同じではありません。のApplicationインスタンスは、自動的にそのサブクラスのインスタンスにはなりません。

score 1 · Accepted Answer

アプリケーションクラスを拡張する場合は、マニフェスト [android:name を追加] を変更する必要があります。あなたの場合、マニフェストに追加する必要があります：

 <application
        android:name=".app.AppData"

android - 2 番目のアクティビティが開始されず、アプリが強制終了します: 致命的な例外メイン。java.lang.ClassCastException:android.app.Application

2 に答える 2

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