Android Java:Java.lang.IllegalStateException:找不到方法:
我有一个android程序崩溃,我在LogCat中得到一个错误:Android Java:Java.lang.IllegalStateException:找不到方法:,android,illegalstateexception,Android,Illegalstateexception,我有一个android程序崩溃,我在LogCat中得到一个错误: E/AndroidRuntime(21504): FATAL EXCEPTION: main E/AndroidRuntime(21504): java.lang.IllegalStateException: Could not find a method sendMesage(View) in the activity class com.example.test.MainActivity for onClick handl
E/AndroidRuntime(21504): FATAL EXCEPTION: main
E/AndroidRuntime(21504): java.lang.IllegalStateException: Could not find a
method sendMesage(View) in the activity class com.example.test.MainActivity
for onClick handler on view class android.widget.Button
以下是我的主要活动:
public class MainActivity extends Activity {
public final static String EXTRA_MESSAGE = "com.example.test.MESSAGE";
@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);
return true;
}
public void sendMessage(View view) {
Intent intent = new Intent(this, DisplayMessageActivity.class);
EditText editText = (EditText) findViewById(R.id.edit_message);
String message = editText.getText().toString();
intent.putExtra(EXTRA_MESSAGE, message);
startActivity(intent);
}
}
以下是我的DisplayMessageActivity:
public class DisplayMessageActivity extends Activity {
@SuppressLint("NewApi")
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_display_message);
// Show the Up button in the action bar.
setupActionBar();
Intent intent = getIntent();
String message = intent.getStringExtra(MainActivity.EXTRA_MESSAGE);
TextView textView = new TextView(this);
textView.setTextSize(40);
textView.setText(message);
setContentView(textView);
}
/**
* Set up the {@link android.app.ActionBar}, if the API is available.
*/
@TargetApi(Build.VERSION_CODES.HONEYCOMB)
private void setupActionBar() {
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.HONEYCOMB) {
getActionBar().setDisplayHomeAsUpEnabled(true);
}
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
switch (item.getItemId()) {
case android.R.id.home:
// This ID represents the Home or Up button. In the case of this
// activity, the Up button is shown. Use NavUtils to allow users
// to navigate up one level in the application structure. For
// more details, see the Navigation pattern on Android Design:
//
// http://developer.android.com/design/patterns/
// navigation.html#up-vs-back
//
NavUtils.navigateUpFromSameTask(this);
return true;
}
return super.onOptionsItemSelected(item);
}
}
我已在MainActivity中正确调用了sendMessage方法,拼写错误的方法在哪里定义?在布局xml文件中,您拼写错误了sendMesage。改变
android:onClick="sendMesage"
到
这是一个小的打字错误。在布局xml中,您编写了一个按钮,
android:onClick=“sendMesage”
。但在main活动中
,将函数编写为public void sendMessage(视图)
缺少一个小的“s;”
sendMesage
和sendMessage
可能看起来很相似,对于计算机来说,它们是完全不同的东西:)谢谢您的帮助,但我似乎找不到我在哪里写的sendMesage。从stacktrace:java.lang.illegalstate异常:找不到方法sendMesage(视图)在活动类com.example.test.main中,查看类android.widget.Button上的onClick处理程序的活动我想你的意思是说更改,android:onClick=“sendMesage”
到android:onClick=“sendMessage”
android:onClick="sendMessage"