当检测到来电时，启动android应用程序

public class CallReceiver extends BroadcastReceiver {
    @Override
    public void onReceive(Context context, Intent intent) {
        // 在这里编写启动应用程序的逻辑代码
    }
}

<receiver android:name=".CallReceiver">
    <intent-filter>
        <action android:name="android.intent.action.PHONE_STATE" />
    </intent-filter>
</receiver>

public class CallReceiver extends BroadcastReceiver {
    @Override
    public void onReceive(Context context, Intent intent) {
        String state = intent.getStringExtra(TelephonyManager.EXTRA_STATE);
        if (state.equals(TelephonyManager.EXTRA_STATE_RINGING)) {
            // 来电状态，启动应用程序
            Intent launchIntent = context.getPackageManager().getLaunchIntentForPackage("com.example.myapp");
            if (launchIntent != null) {
                context.startActivity(launchIntent);
            }
        }
    }
}

<uses-permission android:name="android.permission.READ_PHONE_STATE" />