我的android应用程序force以toast和操作栏搜索结束
我在android galaxy nexus上成功加载了我的应用程序,只需一个操作栏搜索(不起作用)。当我实际执行搜索时,通过检索搜索并弹出一个toast,它在启动时崩溃 我的eclipse错误顾问显示:我的android应用程序force以toast和操作栏搜索结束,android,android-actionbar,toast,Android,Android Actionbar,Toast,我在android galaxy nexus上成功加载了我的应用程序,只需一个操作栏搜索(不起作用)。当我实际执行搜索时,通过检索搜索并弹出一个toast,它在启动时崩溃 我的eclipse错误顾问显示: 06-04 14:33:06.902: D/libEGL(11017): loaded /vendor/lib/egl/libEGL_POWERVR_SGX540_120.so 06-04 14:33:06.956: D/libEGL(11017): loaded /vendor/lib/eg
06-04 14:33:06.902: D/libEGL(11017): loaded /vendor/lib/egl/libEGL_POWERVR_SGX540_120.so
06-04 14:33:06.956: D/libEGL(11017): loaded /vendor/lib/egl/libGLESv1_CM_POWERVR_SGX540_120.so
06-04 14:33:06.987: D/libEGL(11017): loaded /vendor/lib/egl/libGLESv2_POWERVR_SGX540_120.so
06-04 14:33:07.112: D/OpenGLRenderer(11017): Enabling debug mode 0
06-04 14:33:07.237: D/AndroidRuntime(11017): Shutting down VM
06-04 14:33:07.237: W/dalvikvm(11017): threadid=1: thread exiting with uncaught exception (group=0x4121c930)
06-04 14:33:07.253: E/AndroidRuntime(11017): FATAL EXCEPTION: main
06-04 14:33:07.253: E/AndroidRuntime(11017): java.lang.ClassCastException: com.example.beerportfoliopro.MainActivity cannot be cast to android.widget.SearchView$OnQueryTextListener
06-04 14:33:07.253: E/AndroidRuntime(11017): at com.example.beerportfoliopro.MainActivity.onCreateOptionsMenu(MainActivity.java:25)
06-04 14:33:07.253: E/AndroidRuntime(11017): at android.app.Activity.onCreatePanelMenu(Activity.java:2490)
06-04 14:33:07.253: E/AndroidRuntime(11017): at com.android.internal.policy.impl.PhoneWindow.preparePanel(PhoneWindow.java:460)
06-04 14:33:07.253: E/AndroidRuntime(11017): at com.android.internal.policy.impl.PhoneWindow.doInvalidatePanelMenu(PhoneWindow.java:822)
06-04 14:33:07.253: E/AndroidRuntime(11017): at com.android.internal.policy.impl.PhoneWindow$1.run(PhoneWindow.java:253)
06-04 14:33:07.253: E/AndroidRuntime(11017): at android.view.Choreographer$CallbackRecord.run(Choreographer.java:749)
06-04 14:33:07.253: E/AndroidRuntime(11017): at android.view.Choreographer.doCallbacks(Choreographer.java:562)
06-04 14:33:07.253: E/AndroidRuntime(11017): at android.view.Choreographer.doFrame(Choreographer.java:531)
06-04 14:33:07.253: E/AndroidRuntime(11017): at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:735)
06-04 14:33:07.253: E/AndroidRuntime(11017): at android.os.Handler.handleCallback(Handler.java:725)
06-04 14:33:07.253: E/AndroidRuntime(11017): at android.os.Handler.dispatchMessage(Handler.java:92)
06-04 14:33:07.253: E/AndroidRuntime(11017): at android.os.Looper.loop(Looper.java:137)
06-04 14:33:07.253: E/AndroidRuntime(11017): at android.app.ActivityThread.main(ActivityThread.java:5226)
06-04 14:33:07.253: E/AndroidRuntime(11017): at java.lang.reflect.Method.invokeNative(Native Method)
06-04 14:33:07.253: E/AndroidRuntime(11017): at java.lang.reflect.Method.invoke(Method.java:511)
06-04 14:33:07.253: E/AndroidRuntime(11017): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:795)
06-04 14:33:07.253: E/AndroidRuntime(11017): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:562)
06-04 14:33:07.253: E/AndroidRuntime(11017): at dalvik.system.NativeStart.main(Native Method)
我实现这一点的主要步骤如下:
import android.os.Bundle;
import android.app.Activity;
import android.view.Menu;
import android.widget.SearchView;
import android.widget.SearchView.OnQueryTextListener;
import android.widget.Toast;
public class MainActivity extends Activity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
SearchView searchView = (SearchView) menu.findItem(R.id.menu_search).getActionView();
searchView.setOnQueryTextListener((OnQueryTextListener) this);
return true;
}
//get entered search and pop up a toast to show query entered
public boolean onQueryTextSubmit (String query) {
Toast.makeText(this, "Searching for: " + query + "...", Toast.LENGTH_SHORT).show();
return true;
}
}
在这一行中,您试图向OnQueryTextListener类强制转换一个活动。这完全是错误的
而不是将侦听器对象作为参数发送更改搜索视图代码,如下所示 SearchView SearchView=(SearchView)menu.findItem(R.id.menu_search).getActionView()
太棒了,我还需要将类更改为:implements OnQueryTextListener如果实现侦听器,那么只需将其作为参数传递即可@迈克
searchView.setOnQueryTextListener((OnQueryTextListener) this);
searchView.setOnQueryTextListener(new OnQueryTextListener() {
@Override
public boolean onQueryTextSubmit(String query) {
return false;
}
@Override
public boolean onQueryTextChange(String newText) {
return false;
}
});