Java 尝试启动第二个活动时ActivityNotFoundException
我刚刚开始学习Android应用程序编程,我正在学习Android官方基础教程,但我不明白为什么在我做出意图时会出现错误,而应用程序会抛出这个错误Java 尝试启动第二个活动时ActivityNotFoundException,java,android,android-intent,activitynotfoundexception,Java,Android,Android Intent,Activitynotfoundexception,我刚刚开始学习Android应用程序编程,我正在学习Android官方基础教程,但我不明白为什么在我做出意图时会出现错误,而应用程序会抛出这个错误 public class MainActivity extends ActionBarActivity { public static final String EXTRA_MESSAGE = "com.panagetstudios.androidapp.MESSAGE"; @Override protected void
public class MainActivity extends ActionBarActivity {
public static final String EXTRA_MESSAGE = "com.panagetstudios.androidapp.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;
}
@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);
}
public void sendMessage(View view){
Intent inte = new Intent(this, DisplayMessageActivity.class);
EditText edittext = (EditText) findViewById(R.id.edit_message);
String text = edittext.getText().toString();
inte.putExtra(EXTRA_MESSAGE, text);
startActivity(inte);
}
}
这是我的清单文件:
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.panagetstudios.androidapp"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk
android:minSdkVersion="11"
android:targetSdkVersion="21" />
<application
android:allowBackup="true"
android:icon="@drawable/ic_launcher"
android:label="@string/app_name"
android:theme="@style/AppTheme" >
<activity
android:name=".MainActivity"
android:label="@string/app_name" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity
android:name=".DisplayMessageActivity"
android:label="@string/title_activity_display_message" >
<meta-data
android:name="android.support.PARENT_ACTIVITY"
android:value="com.panagetstudios.androidapp.MainActivity" />
</activity>
</application>
</manifest>
我迷路了,请帮帮我,必要时我可以提供更多信息
关于您应该拥有活动的完整程序包名称:
<activity
android:name="com.panagetstudios.androidapp.DisplayMessageActivity"
android:label="@string/title_activity_display_message" >
<meta-data
android:name="android.support.PARENT_ACTIVITY"
android:value="com.panagetstudios.androidapp.MainActivity" />
</activity>
另外,请确保您的活动位于src/com.panagestudios.androidapp文件夹中,并尝试以下操作
<activity
android:name=".DisplayMessageActivity"
android:label="@string/title_activity_display_message" >
<intent-filter>
<action android:name="android.intent.action.DISPLAY" />
<category android:name="android.intent.category.DEFAULT" />
</intent-filter>
</activity>
没关系,伙计们,我刚刚找到了解决方案。我刚刚作为管理员执行了Eclipse并重新启动了我的项目,它工作正常,感谢您的合作请发布整个堆栈跟踪。为什么您的tagetsdkversion值是21而不是20?我的targetsdkversion是21。当我执行ant调试时,堆栈跟踪不会出现,eclipse向我显示了错误所在的行,它对应于ActivityNotFoundException您是否在同一文件夹中有MainActivity和DisplayMessageActivity?(应该是)