使用 SwipeRefreshLayout 运行我的应用程序会导致应用程序崩溃。我试图调试这个问题，但它似乎发生在setColorScheme它进入之后ensureLayout
日志猫：
07-09 16:46:56.093: E/AndroidRuntime(18659): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.heath_bar.twitter/com.heath_bar.twitter.MainActivity}: java.lang.NullPointerException
07-09 16:46:56.093: E/AndroidRuntime(18659): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2328)
07-09 16:46:56.093: E/AndroidRuntime(18659): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2386)
07-09 16:46:56.093: E/AndroidRuntime(18659): at android.app.ActivityThread.access$900(ActivityThread.java:169)
07-09 16:46:56.093: E/AndroidRuntime(18659): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1277)
07-09 16:46:56.093: E/AndroidRuntime(18659): at android.os.Handler.dispatchMessage(Handler.java:102)
07-09 16:46:56.093: E/AndroidRuntime(18659): at android.os.Looper.loop(Looper.java:136)
07-09 16:46:56.093: E/AndroidRuntime(18659): at android.app.ActivityThread.main(ActivityThread.java:5476)
07-09 16:46:56.093: E/AndroidRuntime(18659): at java.lang.reflect.Method.invokeNative(Native Method)
07-09 16:46:56.093: E/AndroidRuntime(18659): at java.lang.reflect.Method.invoke(Method.java:515)
07-09 16:46:56.093: E/AndroidRuntime(18659): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1268)
07-09 16:46:56.093: E/AndroidRuntime(18659): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1084)
07-09 16:46:56.093: E/AndroidRuntime(18659): at dalvik.system.NativeStart.main(Native Method)
07-09 16:46:56.093: E/AndroidRuntime(18659): Caused by: java.lang.NullPointerException
07-09 16:46:56.093: E/AndroidRuntime(18659): at android.support.v4.widget.SwipeRefreshLayout.ensureTarget(SwipeRefreshLayout.java:293)
07-09 16:46:56.093: E/AndroidRuntime(18659): at android.support.v4.widget.SwipeRefreshLayout.setColorScheme(SwipeRefreshLayout.java:268)
07-09 16:46:56.093: E/AndroidRuntime(18659): at com.heath_bar.twitter.MainActivity.onCreate(MainActivity.java:56)
07-09 16:46:56.093: E/AndroidRuntime(18659): at android.app.Activity.performCreate(Activity.java:5451)
07-09 16:46:56.093: E/AndroidRuntime(18659): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1093)
07-09 16:46:56.093: E/AndroidRuntime(18659): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2292)
07-09 16:46:56.093: E/AndroidRuntime(18659): ... 11 more
这是我的代码：
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
SwipeRefreshLayout swipeLayout = (SwipeRefreshLayout) findViewById(R.id.swipe_container);
swipeLayout.setOnRefreshListener(new OnRefreshListener() {
@Override
public void onRefresh() {
// TODO Auto-generated method stub
}
});
swipeLayout.setColorScheme(Color.RED, Color.BLUE, Color.GREEN,
Color.YELLOW);
}
我的xml：
<?xml version="1.0" encoding="utf-8"?>
<android.support.v4.widget.SwipeRefreshLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/swipe_container"
android:layout_width="match_parent"
android:layout_height="match_parent" >
<ScrollView
android:id="@+id/scrollView"
android:layout_width="wrap_content"
android:layout_height="wrap_content" >
<TableLayout
android:id="@+id/table"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_margin="5dp" />
</ScrollView>
</android.support.v4.widget.SwipeRefreshLayout>
任何想法为什么这可能会崩溃？我已经在 Android Private Libraries 下的项目中添加了正确的 jar 文件。
非常感谢所有想法。先感谢您。