android - NullPointerException 因为长按 TextView

Question

感谢 Crashlytics，我发现了这个奇怪的错误，它发生在三星 G386T 上。 Android 应用包含新类包 android.support.v7 以包含“工具栏”组件。不幸的是，这个错误非常“普遍”，它没有在我的应用程序中命名错误开始的类。

自定义 Activity 声明示例:

public class AccessAccountActivity extends ActionBarActivity {

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.access_acount_activity);

    Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
    if (toolbar != null) {
        toolbar.setLogo(R.drawable.ic_toolbar);
        setSupportActionBar(toolbar);
    }

    ActionBar actionBar = getSupportActionBar();
    if (actionBar != null) {
        actionBar.setTitle(getString(R.string.app_name));
        actionBar.setDisplayHomeAsUpEnabled(true);
    }
}

Gradle (安卓工作室):

编译'com.android.support:appcompat-v7:21.0.2'

[错误跟踪]

java.lang.NullPointerException
   at android.widget.Editor.performLongClick(Editor.java:1010)
   at android.widget.TextView.performLongClick(TextView.java:10153)
   at android.view.View$CheckForLongPress.run(View.java:19434)
   at android.os.Handler.handleCallback(Handler.java:733)
   at android.os.Handler.dispatchMessage(Handler.java:95)
   at android.os.Looper.loop(Looper.java:146)
   at android.app.ActivityThread.main(ActivityThread.java:5692)
   at java.lang.reflect.Method.invokeNative(Method.java)
   at java.lang.reflect.Method.invoke(Method.java:515)
   at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1291)
   at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1107)
   at dalvik.system.NativeStart.main(NativeStart.java)

Answer 1

您好，您必须使用 longClick 的返回值 (TRUE)

editText.setOnLongClickListener(new View.OnLongClickListener() {
                    @Override
                    public boolean onLongClick(View v) {
                        return true;
                    }
                });