0

これはlogcatです。なぜこれが起こっているのか誰かが私に言うことは可能でしょうか：

07-29 18:20:44.109: D/AndroidRuntime(8836): Shutting down VM
07-29 18:20:44.109: W/dalvikvm(8836): threadid=1: thread exiting with uncaught exception (group=0x41443300)
07-29 18:20:44.109: E/AndroidRuntime(8836): FATAL EXCEPTION: main
07-29 18:20:44.109: E/AndroidRuntime(8836): java.lang.RuntimeException: Unable to instantiate activity ComponentInfo{com.liamwli.parent.trap/com.liamwli.parent.trap.ParentTrap}: java.lang.ClassCastException: com.liamwli.parent.trap.ParentTrap cannot be cast to android.app.Activity
07-29 18:20:44.109: E/AndroidRuntime(8836):     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2096)
07-29 18:20:44.109: E/AndroidRuntime(8836):     at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2207)
07-29 18:20:44.109: E/AndroidRuntime(8836):     at android.app.ActivityThread.access$600(ActivityThread.java:139)
07-29 18:20:44.109: E/AndroidRuntime(8836):     at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1205)
07-29 18:20:44.109: E/AndroidRuntime(8836):     at android.os.Handler.dispatchMessage(Handler.java:99)
07-29 18:20:44.109: E/AndroidRuntime(8836):     at android.os.Looper.loop(Looper.java:137)
07-29 18:20:44.109: E/AndroidRuntime(8836):     at android.app.ActivityThread.main(ActivityThread.java:4896)
07-29 18:20:44.109: E/AndroidRuntime(8836):     at java.lang.reflect.Method.invokeNative(Native Method)
07-29 18:20:44.109: E/AndroidRuntime(8836):     at java.lang.reflect.Method.invoke(Method.java:511)
07-29 18:20:44.109: E/AndroidRuntime(8836):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:788)
07-29 18:20:44.109: E/AndroidRuntime(8836):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:555)
07-29 18:20:44.109: E/AndroidRuntime(8836):     at dalvik.system.NativeStart.main(Native Method)
07-29 18:20:44.109: E/AndroidRuntime(8836): Caused by: java.lang.ClassCastException: com.liamwli.parent.trap.ParentTrap cannot be cast to android.app.Activity
07-29 18:20:44.109: E/AndroidRuntime(8836):     at android.app.Instrumentation.newActivity(Instrumentation.java:1053)
07-29 18:20:44.109: E/AndroidRuntime(8836):     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2087)
07-29 18:20:44.109: E/AndroidRuntime(8836):     ... 11 more

そして活動：

package com.liamwli.parent.trap;

import android.os.Bundle;
import android.app.Activity;
import android.app.admin.DeviceAdminReceiver;
import android.app.admin.DevicePolicyManager;
import android.content.ComponentName;
import android.content.Context;
import android.content.Intent;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Toast;
import android.support.v4.app.NavUtils;



class ParentTrap extends Activity {

    Button dae, dad, spass;
    EditText pass;
    ComponentName mDeviceAdminSample;
    static final int RESULT_ENABLE = 1;

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

        dae = (Button) findViewById(R.id.benablea);
        dae.setOnClickListener(new View.OnClickListener() {

            @Override
            public void onClick(View arg0) {
                // TODO Auto-generated method stub

                mDeviceAdminSample = new ComponentName(ParentTrap.this,
                        Controller.class);

                Intent intent = new Intent(
                        DevicePolicyManager.ACTION_ADD_DEVICE_ADMIN);
                intent.putExtra(DevicePolicyManager.EXTRA_DEVICE_ADMIN,
                        mDeviceAdminSample);
                intent.putExtra(DevicePolicyManager.EXTRA_ADD_EXPLANATION,
                        "Title");
                startActivityForResult(intent, RESULT_ENABLE);

            }
        });
        dad = (Button) findViewById(R.id.button1);
        dad.setOnClickListener(new View.OnClickListener() {

            @Override
            public void onClick(View arg0) {
                // TODO Auto-generated method stub

            }
        });
        spass = (Button) findViewById(R.id.button2);
        spass.setOnClickListener(new View.OnClickListener() {

            @Override
            public void onClick(View arg0) {
                // TODO Auto-generated method stub

            }
        });

        pass = (EditText) findViewById(R.id.editText1);

        dad.setEnabled(false);
    }

    public class Controller extends DeviceAdminReceiver {

        void showToast(Context context, String msg) {
            String status = "Status";
            Toast.makeText(context, status, Toast.LENGTH_SHORT).show();
        }

        @Override
        public void onEnabled(Context context, Intent intent) {
            showToast(context, "Enabled");
        }

        @Override
        public CharSequence onDisableRequested(Context context, Intent intent) {
            return "Disable Requested";
        }

        @Override
        public void onDisabled(Context context, Intent intent) {
            showToast(context, "Disabled");
        }

        @Override
        public void onPasswordChanged(Context context, Intent intent) {
            showToast(context, "Device PIN Changed");
        }

    }

}

class evilliam {

}
// @Override
// public boolean onCreateOptionsMenu(Menu menu) {
// getMenuInflater().inflate(R.menu.main, menu);
// return true;
// }

助けてくれてありがとう-私は開発ドキュメントをフォローしようとしています：/

新しいLOGCAT：

07-29 18:43:25.404: D/dalvikvm(13404): newInstance failed: Lcom/liamwli/parent/trap/ParentTrap; not accessible to Landroid/app/Instrumentation;
07-29 18:43:25.404: D/AndroidRuntime(13404): Shutting down VM
07-29 18:43:25.404: W/dalvikvm(13404): threadid=1: thread exiting with uncaught exception (group=0x41443300)
07-29 18:43:25.419: E/AndroidRuntime(13404): FATAL EXCEPTION: main
07-29 18:43:25.419: E/AndroidRuntime(13404): java.lang.RuntimeException: Unable to instantiate activity ComponentInfo{com.liamwli.parent.trap/com.liamwli.parent.trap.ParentTrap}: java.lang.IllegalAccessException: access to class not allowed
07-29 18:43:25.419: E/AndroidRuntime(13404):    at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2096)
07-29 18:43:25.419: E/AndroidRuntime(13404):    at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2207)
07-29 18:43:25.419: E/AndroidRuntime(13404):    at android.app.ActivityThread.access$600(ActivityThread.java:139)
07-29 18:43:25.419: E/AndroidRuntime(13404):    at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1205)
07-29 18:43:25.419: E/AndroidRuntime(13404):    at android.os.Handler.dispatchMessage(Handler.java:99)
07-29 18:43:25.419: E/AndroidRuntime(13404):    at android.os.Looper.loop(Looper.java:137)
07-29 18:43:25.419: E/AndroidRuntime(13404):    at android.app.ActivityThread.main(ActivityThread.java:4896)
07-29 18:43:25.419: E/AndroidRuntime(13404):    at java.lang.reflect.Method.invokeNative(Native Method)
07-29 18:43:25.419: E/AndroidRuntime(13404):    at java.lang.reflect.Method.invoke(Method.java:511)
07-29 18:43:25.419: E/AndroidRuntime(13404):    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:788)
07-29 18:43:25.419: E/AndroidRuntime(13404):    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:555)
07-29 18:43:25.419: E/AndroidRuntime(13404):    at dalvik.system.NativeStart.main(Native Method)
07-29 18:43:25.419: E/AndroidRuntime(13404): Caused by: java.lang.IllegalAccessException: access to class not allowed
07-29 18:43:25.419: E/AndroidRuntime(13404):    at java.lang.Class.newInstanceImpl(Native Method)
07-29 18:43:25.419: E/AndroidRuntime(13404):    at java.lang.Class.newInstance(Class.java:1319)
07-29 18:43:25.419: E/AndroidRuntime(13404):    at android.app.Instrumentation.newActivity(Instrumentation.java:1053)
07-29 18:43:25.419: E/AndroidRuntime(13404):    at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2087)
07-29 18:43:25.419: E/AndroidRuntime(13404):    ... 11 more
07-29 18:43:27.214: I/Process(13404): Sending signal. PID: 13404 SIG: 9
4

1 に答える 1

5

アプリはParentTrapがアクティビティであると想定しているようです（そうではなく、Controllerがアクティビティです）。次のことができます。

  1. publicParentTrapの宣言から削除します。

    class ParentTrap extends DeviceAdminReceiver {

    コントローラをpublicクラス（つまりメインクラス）にします。

    public class Controller extends Activity {

  2. Controller内にParentTrapクラスをネストします。

    public class Controller extends Activity {
    public class ParentTrap extends DeviceAdminReceiver {...}

    ...
}

  3. ParentTrapを独自のファイル（ParentTrap.java）に配置します

于 2012-07-29T17:28:40.087 に答える