b/2630339 Fixed the crash when an app requests BT to be enabled

For AlertActivity, the dialog needs to display at onCreate() time.
Otherwise, the decor view would be made. Trying to display the
dialog afterward would crash. Changed to AlertDialog instead.

Change-Id: I2ea8463b4c475b9b54746d0a722fa80eea3d4529

src/com/android/settings/bluetooth/RequestPermissionActivity.java

@@ -16,11 +16,10 @@
 
 package com.android.settings.bluetooth;
 
-import com.android.internal.app.AlertActivity;
-import com.android.internal.app.AlertController;
 import com.android.settings.R;
 
 import android.app.Activity;
+import android.app.AlertDialog;
 import android.bluetooth.BluetoothAdapter;
 import android.bluetooth.BluetoothDevice;
 import android.content.BroadcastReceiver;
@@ -31,14 +30,12 @@ import android.content.IntentFilter;
 import android.content.SharedPreferences;
 import android.os.Bundle;
 import android.util.Log;
-import android.view.View;
-import android.widget.TextView;
 
 /**
  * RequestPermissionActivity asks the user whether to enable discovery. This is
  * usually started by an application wanted to start bluetooth and or discovery
  */
-public class RequestPermissionActivity extends AlertActivity implements
+public class RequestPermissionActivity extends Activity implements
         DialogInterface.OnClickListener {
     // Command line to test this
     // adb shell am start -a android.bluetooth.adapter.action.REQUEST_ENABLE
@@ -73,6 +70,8 @@ public class RequestPermissionActivity extends AlertActivity implements
 
     private boolean mUserConfirmed = false;
 
+    private AlertDialog mDialog = null;
+
     private BroadcastReceiver mReceiver = new BroadcastReceiver() {
 
         @Override
@@ -84,7 +83,7 @@ public class RequestPermissionActivity extends AlertActivity implements
                 int state = intent.getIntExtra(BluetoothAdapter.EXTRA_STATE, BluetoothDevice.ERROR);
                 if (state == BluetoothAdapter.STATE_ON) {
                     if (mUserConfirmed) {
-                        proceedAndFinish(false);
+                        proceedAndFinish();
                     }
                 }
             }
@@ -136,7 +135,7 @@ public class RequestPermissionActivity extends AlertActivity implements
             case BluetoothAdapter.STATE_ON:
                 if (mEnableOnly) {
                     // Nothing to do. Already enabled.
-                    proceedAndFinish(false);
+                    proceedAndFinish();
                     return;
                 } else {
                     // Ask the user about enabling discovery mode
@@ -147,28 +146,24 @@ public class RequestPermissionActivity extends AlertActivity implements
     }
 
     private void createDialog() {
-        final AlertController.AlertParams p = mAlertParams;
+        AlertDialog.Builder builder = new AlertDialog.Builder(this);
-        p.mIconId = android.R.drawable.ic_dialog_info;
+        builder.setIcon(android.R.drawable.ic_dialog_info);
-        p.mTitle = getString(R.string.bluetooth_permission_request);
+        builder.setTitle(getString(R.string.bluetooth_permission_request));
-
-        View view = getLayoutInflater().inflate(R.layout.bluetooth_discoverable, null);
-        p.mView = view;
-        TextView tv = (TextView) view.findViewById(R.id.message);
 
         if (mNeededToEnableBluetooth) {
             // RequestPermissionHelperActivity has gotten confirmation from user
             // to turn on BT
-            tv.setText(getString(R.string.bluetooth_turning_on));
+            builder.setMessage(getString(R.string.bluetooth_turning_on));
+            builder.setCancelable(false);
         } else {
             // Ask the user whether to turn on discovery mode or not
-            tv.setText(getString(R.string.bluetooth_ask_enablement_and_discovery, mTimeout));
+            builder.setMessage(getString(R.string.bluetooth_ask_enablement_and_discovery, mTimeout));
-            p.mPositiveButtonText = getString(R.string.yes);
+            builder.setPositiveButton(getString(R.string.yes), this);
-            p.mPositiveButtonListener = this;
+            builder.setNegativeButton(getString(R.string.no), this);
-            p.mNegativeButtonText = getString(R.string.no);
-            p.mNegativeButtonListener = this;
         }
 
-        setupAlert();
+        mDialog = builder.create();
+        mDialog.show();
     }
 
     @Override
@@ -182,6 +177,7 @@ public class RequestPermissionActivity extends AlertActivity implements
         if (resultCode != RESULT_BT_STARTING_OR_STARTED) {
             setResult(resultCode);
             finish();
+            return;
         }
 
         // Back from RequestPermissionHelperActivity. User confirmed to enable
@@ -189,7 +185,7 @@ public class RequestPermissionActivity extends AlertActivity implements
         mUserConfirmed = true;
 
         if (mLocalManager.getBluetoothState() == BluetoothAdapter.STATE_ON) {
-            proceedAndFinish(false);
+            proceedAndFinish();
         } else {
             // If BT is not up yet, show "Turning on Bluetooth..."
             createDialog();
@@ -199,16 +195,17 @@ public class RequestPermissionActivity extends AlertActivity implements
     public void onClick(DialogInterface dialog, int which) {
         switch (which) {
             case DialogInterface.BUTTON_POSITIVE:
-                proceedAndFinish(true);
+                proceedAndFinish();
                 break;
 
             case DialogInterface.BUTTON_NEGATIVE:
                 setResult(Activity.RESULT_CANCELED);
+                finish();
                 break;
         }
     }
 
-    private void proceedAndFinish(boolean buttonPressed) {
+    private void proceedAndFinish() {
         int returnCode;
 
         if (mEnableOnly) {
@@ -227,10 +224,12 @@ public class RequestPermissionActivity extends AlertActivity implements
             returnCode = Activity.RESULT_CANCELED;
         }
 
-        setResult(returnCode);
+        if (mDialog != null) {
-        if (!buttonPressed) {
+            mDialog.dismiss();
-            finish();
         }
+
+        setResult(returnCode);
+        finish();
     }
 
     private boolean parseIntent() {