我正在启动一个拨打电话的活动,但当我按下“结束通话”按钮时,它不会返回到我的活动。请告诉我如何启动一个可以在按下“结束通话”按钮时返回到我这里的通话活动?以下是我拨打电话的方式:
String url = "tel:3334444";
Intent intent = new Intent(Intent.ACTION_CALL, Uri.parse(url));
我正在启动一个拨打电话的活动,但当我按下“结束通话”按钮时,它不会返回到我的活动。请告诉我如何启动一个可以在按下“结束通话”按钮时返回到我这里的通话活动?以下是我拨打电话的方式:
String url = "tel:3334444";
Intent intent = new Intent(Intent.ACTION_CALL, Uri.parse(url));
使用PhoneStateListener来检测通话何时结束。您很可能需要触发侦听器动作以等待通话开始(等待从PHONE_STATE_OFFHOOK更改为PHONE_STATE_IDLE),然后编写一些代码在IDLE状态下重新启动您的应用程序。
您可能需要在服务中运行侦听器以确保它保持运行并重新启动您的应用程序。以下是一些示例代码:
EndCallListener callListener = new EndCallListener();
TelephonyManager mTM = (TelephonyManager)this.getSystemService(Context.TELEPHONY_SERVICE);
mTM.listen(callListener, PhoneStateListener.LISTEN_CALL_STATE);
监听器定义:
private class EndCallListener extends PhoneStateListener {
@Override
public void onCallStateChanged(int state, String incomingNumber) {
if(TelephonyManager.CALL_STATE_RINGING == state) {
Log.i(LOG_TAG, "RINGING, number: " + incomingNumber);
}
if(TelephonyManager.CALL_STATE_OFFHOOK == state) {
//wait for phone to go offhook (probably set a boolean flag) so you know your app initiated the call.
Log.i(LOG_TAG, "OFFHOOK");
}
if(TelephonyManager.CALL_STATE_IDLE == state) {
//when this state occurs, and your flag is set, restart your app
Log.i(LOG_TAG, "IDLE");
}
}
}
在你的Manifest.xml
文件中添加以下权限:
<uses-permission android:name="android.permission.READ_PHONE_STATE"/>
关于Starter提出的问题,我来回答。
你代码中的问题是你没有正确地传递数字。
代码应该是:
private OnClickListener next = new OnClickListener() {
public void onClick(View v) {
EditText num=(EditText)findViewById(R.id.EditText01);
String number = "tel:" + num.getText().toString().trim();
Intent callIntent = new Intent(Intent.ACTION_CALL, Uri.parse(number));
startActivity(callIntent);
}
};
不要忘记在清单文件中添加权限。
<uses-permission android:name="android.permission.CALL_PHONE"></uses-permission>
或者<uses-permission android:name="android.permission.CALL_PRIVILEGED"></uses-permission>
为了在使用DIAL
时紧急联系,请拨打紧急电话。
PhoneStateListener
来识别电话结束并解决了该问题,但我们还需要在使用 startActivity
启动原始活动之前先 finish()
它,否则通话日志将显示在其前面。import android.content.Intent;
import android.content.SharedPreferences;
import android.preference.PreferenceManager;
import android.telephony.PhoneStateListener;
import android.telephony.TelephonyManager;
import android.util.Log;
public class EndCallListener extends PhoneStateListener {
private String TAG ="EndCallListener";
private int LAUNCHED = -1;
SharedPreferences prefs = PreferenceManager
.getDefaultSharedPreferences(
myActivity.mApp.getBaseContext());
SharedPreferences.Editor _ed = prefs.edit();
@Override
public void onCallStateChanged(int state, String incomingNumber) {
String _prefKey = myActivity.mApp
.getResources().getString(R.string.last_phone_call_state_key),
_bPartyNumber = myActivity.mApp
.getResources().getString(R.string.last_phone_call_bparty_key);
int mLastCallState = prefs.getInt(_prefKey, LAUNCHED);
//Save current call sate for next call
_ed.putInt(_prefKey,state);
_ed.commit();
if(TelephonyManager.CALL_STATE_RINGING == state) {
Log.i(TAG, " >> RINGING, number: " + incomingNumber);
}
if(TelephonyManager.CALL_STATE_IDLE == state && mLastCallState != LAUNCHED ) {
//when this state occurs, and your flag is set, restart your app
if (incomingNumber.equals(_bPartyNumber) == true) {
//Call relates to last app initiated call
Intent _startMyActivity =
myActivity.mApp
.getPackageManager()
.getLaunchIntentForPackage(
myActivity.mApp.getResources()
.getString(R.string.figjam_package_path));
_startMyActivity.setAction(
myActivity.mApp.getResources()
.getString(R.string.main_show_phone_call_list));
myActivity.mApp
.startActivity(_startMyActivity);
Log.i(TAG, "IDLE >> Starting MyActivity with intent");
}
else
Log.i(TAG, "IDLE after calling "+incomingNumber);
}
}
}
将这些添加到strings.xml文件中
<string name="main_show_phone_call_list">android.intent.action.SHOW_PHONE_CALL_LIST</string>
<string name="last_phone_call_state_key">activityLpcsKey</string>
<string name="last_phone_call_bparty_key">activityLpbpKey</string>
如果您需要在调用后返回到外观和感觉之前,请在清单中添加类似以下内容的代码
<activity android:label="@string/app_name" android:name="com.myPackage.myActivity"
android:windowSoftInputMode="stateHidden"
android:configChanges="keyboardHidden" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<action android:name="android.intent.action.SHOW_PHONE_CALL_LIST" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
然后将它们放入您的'myActivity'中
public static Activity mApp=null; //Before onCreate()
...
onCreate( ... ) {
...
if (mApp == null) mApp = this; //Links your resources to other classes
...
//Test if we've been called to show phone call list
Intent _outcome = getIntent();
String _phoneCallAction = mApp.getResources().getString(R.string.main_show_phone_call_list);
String _reqAction = _outcome.getAction();//Can be null when no intent involved
//Decide if we return to the Phone Call List view
if (_reqAction != null &&_reqAction.equals(_phoneCallAction) == true) {
//DO something to return to look and feel
}
...
myListView.setOnItemClickListener(new OnItemClickListener() { //Act on item when selected
@Override
public void onItemClick(AdapterView<?> a, View v, int position, long id) {
myListView.moveToPosition(position);
String _bPartyNumber = "tel:"+myListView.getString(myListView.getColumnIndex(ContactsContract.CommonDataKinds.Phone.NUMBER));
//Provide an initial state for the listener to access.
initialiseCallStatePreferences(_bPartyNumber);
//Setup the listener so we can restart myActivity
EndCallListener _callListener = new EndCallListener();
TelephonyManager _TM = (TelephonyManager)mApp.getSystemService(Context.TELEPHONY_SERVICE);
_TM.listen(_callListener, PhoneStateListener.LISTEN_CALL_STATE);
Intent _makeCall = new Intent(Intent.ACTION_CALL, Uri.parse(_bPartyNumber));
_makeCall.setComponent(new ComponentName("com.android.phone","com.android.phone.OutgoingCallBroadcaster"));
startActivity(_makeCall);
finish();
//Wait for call to enter the IDLE state and then we will be recalled by _callListener
}
});
}//end of onCreate()
使用此代码在myActivity中初始化您的onClick行为,例如在onCreate()之后。
private void initialiseCallStatePreferences(String _BParty) {
final int LAUNCHED = -1;
SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(
mApp.getBaseContext());
SharedPreferences.Editor _ed = prefs.edit();
String _prefKey = mApp.getString(R.string.last_phone_call_state_key),
_bPartyKey = mApp.getString(R.string.last_phone_call_bparty_key);
//Save default call state before next call
_ed.putInt(_prefKey,LAUNCHED);
_ed.putString(_bPartyKey,_BParty);
_ed.commit();
}
您应该发现,点击电话号码列表会完成您的活动,拨打该号码并在通话结束时返回到您的活动。
在您的应用程序仍然存在的情况下从外部进行呼叫不会重新启动您的活动(除非它与上次通话的BParty号码相同)。
:)
您可以使用startActivityForResult()函数。
这是我的示例,首先用户需要输入他/她想要拨打的号码,然后按下呼叫按钮,并被引导到电话界面。在取消呼叫后,用户会被送回应用程序。为了实现这一点,按钮需要在xml中具有一个onClick方法(在此示例中为 'makePhoneCall')。您还需要在清单中注册权限。
清单文件
<uses-permission android:name="android.permission.CALL_PHONE"></uses-permission>
<uses-permission android:name="android.permission.READ_PHONE_STATE" />
活动
import android.net.Uri;
import android.os.Bundle;
import android.app.Activity;
import android.content.Intent;
import android.view.View;
import android.widget.EditText;
import android.widget.Toast;
public class PhoneCall extends Activity {
EditText phoneTo;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_phone_call);
phoneTo = (EditText) findViewById(R.id.phoneNumber);
}
public void makePhoneCall(View view) {
try {
String number = phoneTo.getText().toString();
Intent phoneIntent = new Intent(Intent.ACTION_CALL);
phoneIntent.setData(Uri.parse("tel:"+ number));
startActivity(phoneIntent);
} catch (android.content.ActivityNotFoundException ex) {
Toast.makeText(PhoneCall.this,
"Call failed, please try again later!", Toast.LENGTH_SHORT).show();
}
}
}
XML
<EditText
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:inputType="phone"
android:ems="10"
android:id="@+id/phoneNumber"
android:layout_marginTop="67dp"
android:layout_below="@+id/textView"
android:layout_centerHorizontal="true" />
<Button
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="Call"
android:id="@+id/makePhoneCall"
android:onClick="makePhoneCall"
android:layout_alignParentBottom="true"
android:layout_centerHorizontal="true" />
@Override
public void onClick(View view) {
Intent phoneIntent = new Intent(Intent.ACTION_CALL);
phoneIntent.setData(Uri.parse("tel:91-000-000-0000"));
if (ActivityCompat.checkSelfPermission(mContext, Manifest.permission.CALL_PHONE) != PackageManager.PERMISSION_GRANTED) {
return;
}
startActivity(phoneIntent);
}
这是我个人的解决方案:
ok.setOnClickListener(this);
@Override
public void onClick(View view) {
if(view == ok){
Intent intent = new Intent(Intent.ACTION_CALL);
intent.setData(Uri.parse("tel:" + num));
activity.startActivity(intent);
}
<uses-permission android:name="android.permission.READ_PHONE_STATE" />
在 PhoneStateListener 内,在检测到通话结束后,最好使用以下操作:
Intent intent = new Intent(CallDispatcherActivity.this, CallDispatcherActivity.class);
intent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
startActivity(intent);
CallDispatcherActivity是用户启动呼叫的活动(在我的情况下,是出租车服务调度员)。这只是将Android电话应用程序从顶部移除,用户会回到一个更美观的界面,而不是看到丑陋的代码。
((TelephonyManager)getSystemService(Context.TELEPHONY_SERVICE)).listen(this, LISTEN_NONE);
- Dmitri Novikov