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我正在尝试将开源应用程序集成到我的android应用程序中。我已经将开源应用程序作为库应用程序，并将xml集成到我的Android清单文件中。没有编译错误。android集成库应用程序
第一个屏幕是为图书馆应用的登录画面，当它被称为是在投掷的Java类郎异常错误：
m_app = (TodoApplication) getApplication();
loginscreen.java的源代码：
public class LoginScreen extends Activity {
final static String TAG = LoginScreen.class.getSimpleName();
private TodoApplication m_app;
private Button m_LoginButton;
private BroadcastReceiver m_broadcastReceiver;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.login);
m_app = (TodoApplication) getApplication();
// supposed to help with the banding on the green background
findViewById(R.id.loginbackground).getBackground().setDither(true);
IntentFilter intentFilter = new IntentFilter();
intentFilter.addAction("com.todotxt.todotxttouch.ACTION_LOGIN");
m_broadcastReceiver = new BroadcastReceiver() {
@Override
public void onReceive(Context context, Intent intent) {
Intent i = new Intent(context, TodoTxtTouch.class);
startActivity(i);
finish();
}
};
registerReceiver(m_broadcastReceiver, intentFilter);
m_LoginButton = (Button) findViewById(R.id.login);
m_LoginButton.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
login();
}
});
//final RemoteClient remoteClient = m_app.getRemoteClientManager()
// .getRemoteClient();
//if (remoteClient.isAuthenticated()) {
switchToTodolist();
//}
}
private void switchToTodolist() {
Intent intent = new Intent(this, TodoTxtTouch.class);
startActivity(intent);
finish();
}
@Override
protected void onDestroy() {
super.onDestroy();
unregisterReceiver(m_broadcastReceiver);
}
void login() {
final RemoteClient client = m_app.getRemoteClientManager()
.getRemoteClient();
if (!client.isAvailable()) {
Log.d(TAG, "Remote service " + client.getClass().getSimpleName()
+ " is not available; aborting login");
Util.showToastLong(m_app, R.string.toast_login_notconnected);
} else {
RemoteLoginTask loginTask = client.getLoginTask();
loginTask.showLoginDialog(this);
}
}
}
android manifest.xml中的集成库代码：
<activity android:name="com.todotxt.todotxttouch.LoginScreen" android:label="@string/app_label"
android:theme="@android:style/Theme.NoTitleBar"
android:configChanges="keyboardHidden|orientation">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
<category android:name="com.todotxt.todotxttouch.category.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity android:name="com.todotxt.todotxttouch.TodoApplication" />
<activity android:name="com.todotxt.todotxttouch.Filter" android:label="Filter"
android:theme="@android:style/Theme.NoTitleBar" />
<activity android:name="com.todotxt.todotxttouch.Preferences" android:label="@string/set_preferences" />
<activity android:name="com.todotxt.todotxttouch.AddTask" android:label="@string/addtask"
android:theme="@android:style/Theme.NoTitleBar"
android:configChanges="orientation|keyboardHidden"
android:windowSoftInputMode="adjustResize">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
</intent-filter>
</activity>
<activity-alias android:name="com.todotxt.todotxttouch.AddTaskShortcut"
android:targetActivity="com.todotxt.todotxttouch.AddTask" android:label="@string/shortcut_addtask_name">
<intent-filter>
<action android:name="android.intent.action.CREATE_SHORTCUT" />
<category android:name="android.intent.category.DEFAULT" />
</intent-filter>
</activity-alias>
<activity-alias android:name="com.todotxt.todotxttouch.AddTaskShare"
android:targetActivity="com.todotxt.todotxttouch.AddTask" android:label="@string/share_addtask_name">
<intent-filter>
<action android:name="android.intent.action.SEND" />
<category android:name="android.intent.category.DEFAULT" />
<data android:mimeType="text/plain" />
</intent-filter>
</activity-alias>
<activity android:name="com.todotxt.todotxttouch.HelpActivity"
android:theme="@android:style/Theme.Translucent.NoTitleBar.Fullscreen" />
<activity android:name="com.todotxt.todotxttouch.TodoTxtTouch" android:theme="@android:style/Theme.NoTitleBar"
android:configChanges="keyboardHidden|orientation">
<intent-filter>
<action android:name="android.intent.action.SEARCH" />
</intent-filter>
<meta-data android:name="android.app.searchable"
android:resource="@xml/searchable" />
</activity>
任何人都可以请帮我在理解问题。
让我进一步解释：我有一个名为Todoapplication.java文件....因此类存在......它LoginScreen.java被称为
m_app = (TodoApplication) getApplication();
，这是我在哪里获得java lang类异常？