據我所知(從here)LoopJ AndroidAsyncHttp不使用UI線程,因此我可以在主線程中執行它的方法。 但是當我intilize AsyncHttpClient的新實例的應用程序崩潰 (例外:java.lang.IllegalStateException:無法執行的活動的方法)Android應用程序初始化AndroidAsyncHttp時崩潰
代碼:
public class MainActivity extends ActionBarActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
}
public void Send(View view) {
EditText editText = (EditText) findViewById(R.id.editText1);
String str = editText.getText().toString();
TextView div = (TextView) findViewById(R.id.textView1);
div.setText(str);
//crash
AsyncHttpClient client = new AsyncHttpClient();
}
@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);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
}
錯誤:
09-25 09:58:07.427: W/dalvikvm(2514): threadid=1: thread exiting with uncaught exception (group=0xb1cb2b20)
09-25 09:58:07.477: E/AndroidRuntime(2514): FATAL EXCEPTION: main
09-25 09:58:07.477: E/AndroidRuntime(2514): Process: com.example.mysecondapp, PID: 2514
09-25 09:58:07.477: E/AndroidRuntime(2514): java.lang.IllegalStateException: Could not execute method of the activity
09-25 09:58:07.477: E/AndroidRuntime(2514): at android.view.View$1.onClick(View.java:3823)
09-25 09:58:07.477: E/AndroidRuntime(2514): at android.view.View.performClick(View.java:4438)
09-25 09:58:07.477: E/AndroidRuntime(2514): at android.view.View$PerformClick.run(View.java:18422)
09-25 09:58:07.477: E/AndroidRuntime(2514): at android.os.Handler.handleCallback(Handler.java:733)
09-25 09:58:07.477: E/AndroidRuntime(2514): at android.os.Handler.dispatchMessage(Handler.java:95)
09-25 09:58:07.477: E/AndroidRuntime(2514): at android.os.Looper.loop(Looper.java:136)
09-25 09:58:07.477: E/AndroidRuntime(2514): at android.app.ActivityThread.main(ActivityThread.java:5017)
09-25 09:58:07.477: E/AndroidRuntime(2514): at java.lang.reflect.Method.invokeNative(Native Method)
09-25 09:58:07.477: E/AndroidRuntime(2514): at java.lang.reflect.Method.invoke(Method.java:515)
09-25 09:58:07.477: E/AndroidRuntime(2514): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:779)
09-25 09:58:07.477: E/AndroidRuntime(2514): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:595)
09-25 09:58:07.477: E/AndroidRuntime(2514): at dalvik.system.NativeStart.main(Native Method)
09-25 09:58:07.477: E/AndroidRuntime(2514): Caused by: java.lang.reflect.InvocationTargetException
09-25 09:58:07.477: E/AndroidRuntime(2514): at java.lang.reflect.Method.invokeNative(Native Method)
09-25 09:58:07.477: E/AndroidRuntime(2514): at java.lang.reflect.Method.invoke(Method.java:515)
09-25 09:58:07.477: E/AndroidRuntime(2514): at android.view.View$1.onClick(View.java:3818)
09-25 09:58:07.477: E/AndroidRuntime(2514): ... 11 more
09-25 09:58:07.477: E/AndroidRuntime(2514): Caused by: java.lang.NoClassDefFoundError: com.loopj.android.http.AsyncHttpClient
09-25 09:58:07.477: E/AndroidRuntime(2514): at com.example.mysecondapp.MainActivity.Send(MainActivity.java:46)
09-25 09:58:07.477: E/AndroidRuntime(2514): ... 14 more
plz把你的'AsyncHttpClient'代碼 – Rustam 2014-09-25 17:30:43
檢查你的'logcat'' 09-25 09:58:07.477:E/AndroidRuntime(2514):引起:java.lang.NoClassDefFoundError:com.loopj.android.http。 AsyncHttpClient' – Rustam 2014-09-25 17:34:33
看起來你缺少一個依賴。請參閱[this](http://stackoverflow.com/questions/20327940/android-no-class-def-found-error-for-com-loopj-android-http-asynchttpclient)或[this](http:// stackoverflow.com/questions/16980159/no-class-def-found-error-android) – codeMagic 2014-09-25 17:34:40