Android - 多次广播接收器呼叫活动

Question

我有一个receiver听取拨出电话

    <receiver android:name="com.example.playground.OutgoingCallReceiver" >
        <intent-filter>
            <action android:name="android.intent.action.PHONE_STATE" />
            <action android:name="android.intent.action.NEW_OUTGOING_CALL" />
        </intent-filter>
    </receiver>

    <activity
        android:name="com.example.playground.OutgoingCallActivity"
        android:configChanges="orientation|keyboardHidden|screenSize"
        android:label="@string/title_activity_outgoing_call"
        android:theme="@style/FullscreenTheme" >
        <intent-filter>
            <action android:name="com.example.playground.OutgoingCallActivity" />
            <category android:name="android.intent.category.DEFAULT" />
        </intent-filter>
    </activity>

随着permissions

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

我的receiver：

package com.example.playground;

import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;

public class OutgoingCallReceiver extends BroadcastReceiver {

    @Override
    public void onReceive(Context context, Intent intent) {
        String number = intent.getStringExtra(Intent.EXTRA_PHONE_NUMBER);
        Intent contactIntent = new Intent("com.example.playground.OutgoingCallActivity");
        contactIntent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
        contactIntent.putExtra("number", number);
        context.startActivity(contactIntent);
    }
}

而我的activity：

    Intent intent = getIntent();
    String number = intent.getStringExtra("number");
    displayContact(number);

public void displayContact(String number) {
    contactsContainer = (TextView) findViewById(R.id.fullscreen_content);
    contactsContainer.setText(number);
}

现在，当我拨打我的电话时，activity被正确调用，但当我挂断电话时，activity再次启动，我的receiver被多次调用。我只是想在触发拨出电话时调用它。

Answer 1

接收器按原样发射。但你需要验证电话状态。即挂断电话时不要启动活动

    @Override
    public void onReceive(Context context, Intent intent) {
        String action = intent.getAction();
        if (action.equals(TelephonyManager.ACTION_PHONE_STATE_CHANGED)
                && intent.getStringExtra(TelephonyManager.EXTRA_STATE)
                        .equals(TelephonyManager.EXTRA_STATE_IDLE)) {
            return; // Dont start Activity
        }
        // Your code
    }

Answer 2

在所有操作之前：请确保你写了unregisterReceiver，我有同样的问题因为我忘了在我的活动中调用这个方法，我不知道为什么但是当我在我的代码中添加它时每件事情都很好

在您的活动中：

把这个属性：

private Debug_bluetooth_receiver addRemoveModulesDebugReceiver;

并且：

@Override
protected void onResume() {
        super.onResume();
        addRemoveModulesDebugReceiver = new Debug_bluetooth_receiver();
        registerReceiver(addRemoveModulesDebugReceiver, new IntentFilter("DEBUG_BLUETOOTH")); }

并且：

@Override
protected void onPause() {
    super.onPause();
    unregisterReceiver(addRemoveModulesDebugReceiver); }

和：OnResume之后

public class Debug_bluetooth_receiver extends BroadcastReceiver {
    public Debug_bluetooth_receiver() { super(); }

    @Override
    public void onReceive(Context context, Intent intent) {
        String action = intent.getAction();
        if (action.equals("DEBUG_BLUETOOTH")){
            // some extras in Intent 
            boolean enableDebugBluetoothModule = intent.getBooleanExtra("STATE", true);
            if (enableDebugBluetoothModule){
                // TODO
            }else {
                // TODO
            }
        }
    }
}

现在转到您要向此活动发送消息的另一个代码：

    Intent intent = new Intent("DEBUG_BLUETOOTH");
    intent.putExtra( "STATE", false); // send Extras 
    getActivity().sendBroadcast(intent);

希望有所帮助