我对Android开发非常陌生。我在运行我的应用程序时遇到问题。我正在尝试通过使用BroadcastReceiver为来电通知举杯。但是我从清单com.sortinousn.Salesforce.calltracker中得到了这个错误,无法分配给android.app.Activity。
AndroidManifest.xml
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.sortinousn.salesforcecalltracker"
android:versionCode="1"
android:versionName="1.0" >
<application
android:allowBackup="true"
android:label="@string/app_name"
android:theme="@style/AppTheme" >
<activity
android:name="com.sortinousn.salesforcecalltracker.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>
<receiver android:name=".MainActivity">
<intent-filter>
<action android:name="android.intent.action.PHONE_STATE" />
</intent-filter>
</receiver>
</application>
<uses-sdk
android:minSdkVersion="8"
android:targetSdkVersion="17" />
<uses-permission android:name="android.permission.READ_PHONE_STATE"></uses- permission>
</manifest>
主要活动
public class MainActivity extends BroadcastReceiver {
Context pcontext;
public void onReceive(Context context, Intent intent) {
try {
// TELEPHONY MANAGER class object to register one listner
TelephonyManager tmgr = (TelephonyManager) context
.getSystemService(Context.TELEPHONY_SERVICE);
//Create Listner
MyPhoneStateListener PhoneListener = new MyPhoneStateListener();
// Register listener for LISTEN_CALL_STATE
tmgr.listen(PhoneListener, PhoneStateListener.LISTEN_CALL_STATE);
} catch (Exception e) {
Log.e("Phone Receive Error", " " + e);
}
}
private class MyPhoneStateListener extends PhoneStateListener {
public void onCallStateChanged(int state, String incomingNumber) {
Log.d("MyPhoneListener",state+" incoming no:"+incomingNumber);
if (state == 1) {
String msg = "New Phone Call Event. Incomming Number : "+incomingNumber;
int duration = Toast.LENGTH_LONG;
Toast toast = Toast.makeText(pcontext, msg, duration);
toast.show();
}
}
}
}
最佳答案
我不太明白为什么您将MainActivity
类作为activity
和receiver
...这些是不一样的。
正如我在您的代码中看到的那样,您没有任何活动,因为您在MainActivity类中扩展了BroadcastReceiver
...所以...只需通过扩展另一个具有Activity
的类(或其他类)来进行真正的活动),并在清单中将此类声明为活动,就像这样:Activity
:
package fr.zwedge.kingwarrior;
import android.app.*;
import android.os.Bundle;
public class Main extends Activity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
// Tell me if I'm wrong for what's above
BroadcastReceiver receiver = new BroadcastReceiver() {
public void onReceive(Context context, Intent intent) {
try {
// TELEPHONY MANAGER class object to register one listner
TelephonyManager tmgr = (TelephonyManager) context.getSystemService(Context.TELEPHONY_SERVICE);
//Create Listner
MyPhoneStateListener PhoneListener = new MyPhoneStateListener();
// Register listener for LISTEN_CALL_STATE
tmgr.listen(PhoneListener, PhoneStateListener.LISTEN_CALL_STATE);
} catch (Exception e) {
Log.e("Phone Receive Error", " " + e);
}
}
}
}
public /* can't be private here */ class MyPhoneStateListener extends PhoneStateListener {
public void onCallStateChanged(int state, String incomingNumber) {
Log.d("MyPhoneListener",state+" incoming no:"+incomingNumber);
if (state == 1) {
String msg = "New Phone Call Event. Incomming Number : "+incomingNumber;
int duration = Toast.LENGTH_LONG;
Toast toast = Toast.makeText(pcontext, msg, duration);
toast.show();
}
}
}
Manifest
:<application android:allowBackup="true"
android:label="King Warrior"
android:icon="@drawable/ic_launch">
<activity android:name=".Main"
android:label="What you want"
android:icon="@drawable/ic_launch">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
希望能帮助到你,
黑暗之球60。
=================================
或者,如果您不需要应用程序的任何界面,则可以只删除清单中的
<activity />
标记。