2

EditTextにTextChangedListenerを追加しようとしています。

        statusText = (EditText) findViewById(R.id.statusText);
        //Everythig is ok here...
        statusText.addTextChangedListener(new TextWatcher() {
            public void afterTextChanged(Editable s) {
            //After this moment app crushes with Null pointer error
            }

            public void beforeTextChanged(CharSequence s, int start, int count,
                    int after) {
            }

            public void onTextChanged(CharSequence s, int start, int before,
                    int count) {
            }
        });

私のログ：

    12-09 02:29:25.198: E/AndroidRuntime(5167): FATAL EXCEPTION: main
12-09 02:29:25.198: E/AndroidRuntime(5167): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.bresiu.elemelek/com.bresiu.elemelek.MainActivity}: java.lang.NullPointerException
12-09 02:29:25.198: E/AndroidRuntime(5167):     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2180)
12-09 02:29:25.198: E/AndroidRuntime(5167):     at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2230)
12-09 02:29:25.198: E/AndroidRuntime(5167):     at android.app.ActivityThread.access$600(ActivityThread.java:141)
12-09 02:29:25.198: E/AndroidRuntime(5167):     at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1234)
12-09 02:29:25.198: E/AndroidRuntime(5167):     at android.os.Handler.dispatchMessage(Handler.java:99)
12-09 02:29:25.198: E/AndroidRuntime(5167):     at android.os.Looper.loop(Looper.java:137)
12-09 02:29:25.198: E/AndroidRuntime(5167):     at android.app.ActivityThread.main(ActivityThread.java:5039)
12-09 02:29:25.198: E/AndroidRuntime(5167):     at java.lang.reflect.Method.invokeNative(Native Method)
12-09 02:29:25.198: E/AndroidRuntime(5167):     at java.lang.reflect.Method.invoke(Method.java:511)
12-09 02:29:25.198: E/AndroidRuntime(5167):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:793) 
12-09 02:29:25.198: E/AndroidRuntime(5167):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:560)
12-09 02:29:25.198: E/AndroidRuntime(5167):     at dalvik.system.NativeStart.main(Native Method)
12-09 02:29:25.198: E/AndroidRuntime(5167): Caused by: java.lang.NullPointerException
12-09 02:29:25.198: E/AndroidRuntime(5167):     at com.bresiu.elemelek.MainActivity.onTabSelected(MainActivity.java:213)
12-09 02:29:25.198: E/AndroidRuntime(5167):     at com.android.internal.app.ActionBarImpl.selectTab(ActionBarImpl.java:570)
12-09 02:29:25.198: E/AndroidRuntime(5167):     at com.android.internal.app.ActionBarImpl.addTab(ActionBarImpl.java:499)
12-09 02:29:25.198: E/AndroidRuntime(5167):     at com.android.internal.app.ActionBarImpl.addTab(ActionBarImpl.java:485)
12-09 02:29:25.198: E/AndroidRuntime(5167):     at com.bresiu.elemelek.MainActivity.onCreate(MainActivity.java:107)
12-09 02:29:25.198: E/AndroidRuntime(5167):     at android.app.Activity.performCreate(Activity.java:5104)
12-09 02:29:25.198: E/AndroidRuntime(5167):     at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1080)
12-09 02:29:25.198: E/AndroidRuntime(5167):     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2144)
12-09 02:29:25.198: E/AndroidRuntime(5167):     ... 11 more 
12-09 02:29:27.068: E/GetJar SDK(5181): PackageMonitor: doOnReceive(): failed
12-09 02:29:27.068: E/GetJar SDK(5181): java.lang.IllegalStateException: Unable to access the application key
12-09 02:29:27.068: E/GetJar SDK(5181):     at com.getjar.sdk.data.metadata.PackageMonitor.doOnReceive(PackageMonitor.java:113)
12-09 02:29:27.068: E/GetJar SDK(5181):     at com.getjar.sdk.data.metadata.PackageMonitor.access$000(PackageMonitor.java:62)
12-09 02:29:27.068: E/GetJar SDK(5181):     at com.getjar.sdk.data.metadata.PackageMonitor$1.run(PackageMonitor.java:87)
12-09 02:29:27.068: E/GetJar SDK(5181):     at java.lang.Thread.run(Thread.java:856)
12-09 02:29:30.628: E/GetJar SDK(5576): PackageMonitor: doOnReceive(): failed
12-09 02:29:30.628: E/GetJar SDK(5576): java.lang.IllegalStateException: Unable to access the application key
12-09 02:29:30.628: E/GetJar SDK(5576):     at com.getjar.sdk.data.metadata.PackageMonitor.doOnReceive(PackageMonitor.java:113)
12-09 02:29:30.628: E/GetJar SDK(5576):     at com.getjar.sdk.data.metadata.PackageMonitor.access$000(PackageMonitor.java:62)
12-09 02:29:30.628: E/GetJar SDK(5576):     at com.getjar.sdk.data.metadata.PackageMonitor$1.run(PackageMonitor.java:87)
12-09 02:29:30.628: E/GetJar SDK(5576):     at java.lang.Thread.run(Thread.java:856)

layout.xmlを確認しましたが、すべて問題ありません。これはFragmentActivityが原因だと思います（私のアプリはタブを実装しています）。より良いexplein問題に追加する必要がある追加情報は何ですか？

主な活動：

http://pastebin.com/NAiw8VFe

4

1 に答える 1

1

コンテンツビューはR.layout.mainですが、tab1から値を要求しています。タブ内のビューを設定しているようです。すべての設定アクションリスナーをのタブインターフェイスに移動することをお勧めしますonCreateView。次の方法で右側のビューを参照します。

statusText = (EditText) rootView.findViewById(R.id.statusText);
于 2012-12-09T02:42:39.363 に答える