我正在创建一个应用程序，我在 listview 中获取呼叫历史记录，现在我正在尝试的是在任何传入或传出呼叫断开之后，我想打开< em> listview ，但我不知道我的应用程序没有打开。任何通话后都不显示我的 listview 页面，以下是我的代码
public class MainActivity extends Activity {
private ListView listview=null;
private String callType=null;
private String phoneNumber=null;
private String callDate=null;
private String callDuration=null;
private Date callDateTime=null;
private List<CallData> list=new ArrayList<CallData>();
private Context context=null;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
context=this;
listview=(ListView)findViewById(R.id.listView_calldata);
getCallDetails();
CustomAdapter adapter=new CustomAdapter(MainActivity.this, list);
listview.setAdapter(adapter);
}
public void getCallDetails()
{
Cursor managedCursor = getContentResolver().query(CallLog.Calls.CONTENT_URI,null, null,null, null);
int number = managedCursor.getColumnIndex( CallLog.Calls.NUMBER );
int type = managedCursor.getColumnIndex( CallLog.Calls.TYPE );
int date = managedCursor.getColumnIndex( CallLog.Calls.DATE);
int duration = managedCursor.getColumnIndex( CallLog.Calls.DURATION);
while (managedCursor.moveToNext())
{
phoneNumber = managedCursor.getString(number);
callType = managedCursor.getString(type);
callDate = managedCursor.getString(date);
callDateTime = new Date(Long.valueOf(callDate));
callDuration = managedCursor.getString(duration);
String cType = null;
int cTypeCode = Integer.parseInt(callType);
switch(cTypeCode)
{
case CallLog.Calls.OUTGOING_TYPE:
cType = "OUTGOING";
break;
case CallLog.Calls.INCOMING_TYPE:
cType= "INCOMING";
break;
case CallLog.Calls.MISSED_TYPE:
cType = "MISSED";
break;
}
CallData calldata=new CallData(cType, phoneNumber, callDateTime, callDuration);
list.add(calldata);
}
managedCursor.close();
}
}
PhoneCallReceiver
public abstract class PhonecallReceiver extends BroadcastReceiver {
//The receiver will be recreated whenever android feels like it. We need a static variable to remember data between instantiations
static PhonecallStartEndDetector listener;
String outgoingSavedNumber;
protected Context savedContext;
@Override
public void onReceive(Context context, Intent intent) {
savedContext = context;
if(listener == null){
listener = new PhonecallStartEndDetector();
}
//We listen to two intents. The new outgoing call only tells us of an outgoing call. We use it to get the number.
if (intent.getAction().equals("android.intent.action.NEW_OUTGOING_CALL")) {
listener.setOutgoingNumber(intent.getExtras().getString("android.intent.extra.PHONE_NUMBER"));
return;
}
//The other intent tells us the phone state changed. Here we set a listener to deal with it
TelephonyManager telephony = (TelephonyManager)context.getSystemService(Context.TELEPHONY_SERVICE);
telephony.listen(listener, PhoneStateListener.LISTEN_CALL_STATE);
}
//Derived classes should override these to respond to specific events of interest
protected abstract void onIncomingCallStarted(String number, Date start);
protected abstract void onOutgoingCallStarted(String number, Date start);
protected abstract void onIncomingCallEnded(String number, Date start, Date end);
protected abstract void onOutgoingCallEnded(String number, Date start, Date end);
protected abstract void onMissedCall(String number, Date start);
//Deals with actual events
public class PhonecallStartEndDetector extends PhoneStateListener {
int lastState = TelephonyManager.CALL_STATE_IDLE;
Date callStartTime;
boolean isIncoming;
String savedNumber; //because the passed incoming is only valid in ringing
public PhonecallStartEndDetector() {}
//The outgoing number is only sent via a separate intent, so we need to store it out of band
public void setOutgoingNumber(String number){
savedNumber = number;
}
//Incoming call- goes from IDLE to RINGING when it rings, to OFFHOOK when it's answered, to IDLE when its hung up
//Outgoing call- goes from IDLE to OFFHOOK when it dials out, to IDLE when hung up
@Override
public void onCallStateChanged(int state, String incomingNumber) {
super.onCallStateChanged(state, incomingNumber);
if(lastState == state){
//No change, debounce extras
return;
}
switch (state) {
case TelephonyManager.CALL_STATE_RINGING:
isIncoming = true;
callStartTime = new Date();
savedNumber = incomingNumber;
onIncomingCallStarted(incomingNumber, callStartTime);
break;
case TelephonyManager.CALL_STATE_OFFHOOK:
//Transition of ringing->offhook are pickups of incoming calls. Nothing donw on them
if(lastState != TelephonyManager.CALL_STATE_RINGING){
isIncoming = false;
callStartTime = new Date();
onOutgoingCallStarted(savedNumber, callStartTime);
}
break;
case TelephonyManager.CALL_STATE_IDLE:
//Went to idle- this is the end of a call. What type depends on previous state(s)
if(lastState == TelephonyManager.CALL_STATE_RINGING){
//Ring but no pickup- a miss
onMissedCall(savedNumber, callStartTime);
}
else if(isIncoming){
onIncomingCallEnded(savedNumber, callStartTime, new Date());
}
else{
onOutgoingCallEnded(savedNumber, callStartTime, new Date());
}
break;
}
lastState = state;
}
}
清单
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.tests"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk
android:minSdkVersion="8"
android:targetSdkVersion="21" />
<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"/>
<application
android:allowBackup="true"
android:icon="@drawable/ic_launcher"
android:label="@string/app_name"
android:theme="@style/AppTheme" >
<receiver android:name=".PhonecallReceiver" >
<intent-filter>
<action android:name="android.intent.action.PHONE_STATE" />
</intent-filter>
<intent-filter>
<action android:name="android.intent.action.NEW_OUTGOING_CALL" />
</intent-filter>
</receiver>
<!--This part is inside the application-->
<activity
android:name=".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>
</application>
</manifest>
答案 0 :(得分：1)
您已将PhonecallReceiver声明为abstract。这意味着Android无法在需要时对其进行实例化。您需要重新考虑您的架构。清单中声明的BroadcastReceiver不能是abstract，因为Android需要能够根据需要自行实例化它们。要么使PhonecallReceiver具体（不是抽象），要么在清单中将具体子类添加为<receiver>。