我有一个活动，当第一次从onPause转到后台（onResume）创建该活动时，布局不再可见。我尝试通过startActivity调用该活动，但没有用....任何帮助显示活动布局????这是我的活动代码
public class
InComingCallActivity extends Activity { // do NOT extend from UC*Activity, we do not want to login on this screen!
private static final String LOG_TAG = "InComingCallActivity";
// only one instance of this class should be displayed
// TODO find how to avoid multiple creations
private static InComingCallActivity sharedInstance = null;
private ImageView mCallingUserAvatarView;
private TextView mRoomNameTextView;
private Button mIgnoreCallButton;
private Button mAcceptCallButton;
private String mCallId;
private String mMatrixId;
private MXSession mSession;
private IMXCall mMxCall;
static Thread thread;
private final IMXCall.MXCallListener mMxCallListener = new IMXCall.MXCallListener() {
@Override
public void onStateDidChange(String state) {
Log.d(LOG_TAG, "## onStateDidChange(): state=" + state);
}
@Override
public void onCallError(String aErrorMsg) {
Log.d(LOG_TAG, "## dispatchOnCallError(): error=" + aErrorMsg);
if (IMXCall.CALL_ERROR_USER_NOT_RESPONDING.equals(aErrorMsg)) {
CommonActivityUtils.displayToastOnUiThread(InComingCallActivity.this, InComingCallActivity.this.getString(R.string.call_error_user_not_responding));
} else if (IMXCall.CALL_ERROR_ICE_FAILED.equals(aErrorMsg)) {
CommonActivityUtils.displayToastOnUiThread(InComingCallActivity.this, InComingCallActivity.this.getString(R.string.call_error_ice_failed));
} else if (IMXCall.CALL_ERROR_CAMERA_INIT_FAILED.equals(aErrorMsg)) {
CommonActivityUtils.displayToastOnUiThread(InComingCallActivity.this, InComingCallActivity.this.getString(R.string.call_error_camera_init_failed));
} else {
CommonActivityUtils.displayToastOnUiThread(InComingCallActivity.this, aErrorMsg);
}
// thread.interrupt();
}
@Override
public void onViewLoading(View callview) {
Log.d(LOG_TAG, "## onViewLoading():");
}
@Override
public void onViewReady() {
Log.d(LOG_TAG, "## onViewReady(): ");
if (null != mMxCall) {
if (mMxCall.isIncoming()) {
mMxCall.launchIncomingCall(null);
Log.d(LOG_TAG, "## onViewReady(): Incoming Call Launched ");
} else {
Log.d(LOG_TAG, "## onViewReady(): not incoming call");
// thread.interrupt();
}
}
}
/**
* The call was answered on another device
*/
@Override
public void onCallAnsweredElsewhere() {
InComingCallActivity.this.runOnUiThread(new Runnable() {
@Override
public void run() {
Log.d(LOG_TAG, "## onCallAnsweredElsewhere(): finish activity");
CommonActivityUtils.displayToastOnUiThread(InComingCallActivity.this, InComingCallActivity.this.getString(R.string.call_error_answered_elsewhere));
InComingCallActivity.this.finish();
}
});
}
@Override
public void onCallEnd(final int aReasonId) {
InComingCallActivity.this.runOnUiThread(new Runnable() {
@Override
public void run() {
Log.d(LOG_TAG, "## onCallEnd(): finish activity");
CommonActivityUtils.processEndCallInfo(InComingCallActivity.this, aReasonId);
// thread.interrupt();
InComingCallActivity.this.finish();
}
});
}
@Override
public void onPreviewSizeChanged(int i, int i1) {
}
};
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
requestWindowFeature(Window.FEATURE_NO_TITLE);
setFinishOnTouchOutside(false);
setContentView(R.layout.vector_incoming_call_dialog);
Log.e(LOG_TAG, "## onCreate(): intent created");
// retrieve intent extras
final Intent intent = getIntent();
if (intent == null) {
Log.e(LOG_TAG, "## onCreate(): intent missing");
finish();
} else {
mMatrixId = intent.getStringExtra(VectorCallViewActivity.EXTRA_MATRIX_ID);
mCallId = intent.getStringExtra(VectorCallViewActivity.EXTRA_CALL_ID);
if (null == mMatrixId) {
Log.e(LOG_TAG, "## onCreate(): matrix ID is missing in extras");
finish();
} else if (null == mCallId) {
Log.e(LOG_TAG, "## onCreate(): call ID is missing in extras");
finish();
} else if (null == (mSession = Matrix.getInstance(getApplicationContext()).getSession(mMatrixId))) {
Log.e(LOG_TAG, "## onCreate(): invalid session (null)");
finish();
} else if (null == (mMxCall = mSession.mCallsManager.getCallWithCallId(mCallId))) {
Log.e(LOG_TAG, "## onCreate(): invalid call ID (null)");
finish();
} else {
synchronized (LOG_TAG) {
if (null != sharedInstance) {
sharedInstance.finish();
Log.e(LOG_TAG, "## onCreate(): kill previous instance");
}
sharedInstance = this;
}
// UI widgets binding
mCallingUserAvatarView = (ImageView) findViewById(R.id.avatar_img);
mRoomNameTextView = (TextView) findViewById(R.id.room_name);
mAcceptCallButton = (Button) findViewById(R.id.button_incoming_call_accept);
mIgnoreCallButton = (Button) findViewById(R.id.button_incoming_call_ignore);
// set the avatar
VectorUtils.loadRoomAvatar(this, mSession, mCallingUserAvatarView, mMxCall.getRoom());
// set the room display name
String roomDisplayName = VectorUtils.getRoomDisplayName(this, mSession, mMxCall.getRoom());
if (null != roomDisplayName) {
mRoomNameTextView.setText(roomDisplayName);
} else {
mRoomNameTextView.setText("");
}
// set button handlers
mIgnoreCallButton.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
onHangUp();
finish();
}
});
mAcceptCallButton.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
startCallViewActivity(intent);
finish();
}
});
// create the call view to enable mMxCallListener being used,
// otherwise call API is not enabled
mMxCall.createCallView();
}
}
/* thread = new Thread() {
@Override
public void run() {
try {
while (!isInterrupted()) {
Thread.sleep(500);
if (hasWindowFocus() || iscalllcame) {
iscalllcame = true;
Log.d(LOG_TAG, "## Thread Running : OnResume Falied to call ");
} else {
// InComingCallActivity.this.onResume();
final Intent intent = new Intent(InComingCallActivity.this, InComingCallActivity.class);
intent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP | Intent.FLAG_ACTIVITY_SINGLE_TOP | Intent.FLAG_ACTIVITY_NEW_TASK);
intent.putExtra(VectorCallViewActivity.EXTRA_MATRIX_ID, mMatrixId);
intent.putExtra(VectorCallViewActivity.EXTRA_CALL_ID, mCallId);
startActivity(intent);
thread.interrupt();
Log.d(LOG_TAG, "## Thread Running : OnResume Called");
}
}
} catch (Exception e) {
e.printStackTrace();
}
}
};*/
// thread.start();
}
@Override
public void finish() {
super.finish();
synchronized (LOG_TAG) {
if (this == sharedInstance) {
sharedInstance = null;
}
}
}
@Override
protected void onResume() {
super.onResume();
iscalllcame = false;
mMxCall = mSession.mCallsManager.getCallWithCallId(mCallId);
Log.d(LOG_TAG, "## onResume : here");
if (null != mMxCall) {
String callState = mMxCall.getCallState();
boolean isWaitingUserResponse =
TextUtils.equals(callState, IMXCall.CALL_STATE_CREATING_CALL_VIEW) ||
TextUtils.equals(callState, IMXCall.CALL_STATE_FLEDGLING) ||
TextUtils.equals(callState, IMXCall.CALL_STATE_WAIT_LOCAL_MEDIA) ||
TextUtils.equals(callState, IMXCall.CALL_STATE_WAIT_CREATE_OFFER) ||
TextUtils.equals(callState, IMXCall.CALL_STATE_RINGING);
if (isWaitingUserResponse) {
mMxCall.onResume();
mMxCall.addListener(mMxCallListener);
} else {
Log.d(LOG_TAG, "## onResume : the call has already been managed.");
finish();
}
} else {
Log.d(LOG_TAG, "## onResume : the call does not exist anymore");
finish();
}
}
@Override
protected void onPause() {
super.onPause();
Log.d(LOG_TAG, "## onPause : here");
if (null != mMxCall) {
mMxCall.onPause();
mMxCall.removeListener(mMxCallListener);
Log.d(LOG_TAG, "## onPause : There");
}
}
@Override
protected void onDestroy() {
super.onDestroy();
Log.d(LOG_TAG, "## onDestory : There");
if (null != mMxCall) {
mMxCall.removeListener(mMxCallListener);
Log.d(LOG_TAG, "## onDestory : here");
}
}
@Override
public void onBackPressed() {
onHangUp();
}
/**
* Helper method: starts the CallViewActivity in auto accept mode.
* The extras provided in are copied to
* the CallViewActivity and {@link VectorCallViewActivity#EXTRA_AUTO_ACCEPT} is set to true.
*
* @param aSourceIntent the intent whose extras are transmitted
*/
private void startCallViewActivity(final Intent aSourceIntent) {
Intent intent = new Intent(this, VectorCallViewActivity.class);
Bundle receivedData = aSourceIntent.getExtras();
intent.putExtras(receivedData);
intent.putExtra(VectorCallViewActivity.EXTRA_AUTO_ACCEPT, true);
startActivity(intent);
}
/**
* Hangup the call.
*/
private void onHangUp() {
if (null != mMxCall) {
mMxCall.hangup("");
}
}
}