我正在尝试创建一个AlertDialog，我已经完成了这一百次，但这次它不起作用。我的活动中的onResume()方法中包含此代码：
@Override
protected void onResume() {
super.onResume();
if (DEBUG)
Log.i("BrazoRobot", "onResume()");
isSystemRdy = false;
mBluetoothHelper = new BluetoothHelper(this, bluetoothName);
mBluetoothHelper.connect();
mBluetoothHelper.setOnBluetoothConnected(this);
}
正确创建了不是Activity类的对象BluetoothHelper，我将活动上下文传递给它：
public BluetoothHelper (final Context ctx, final String bluetoothName) {
mActivity = ((Activity)ctx);
this.ctx = ctx;
this.bluetoothName = bluetoothName;
}
问题在于我创建对话框的connect()方法：
if (!mBluetoothAdapter.isEnabled()) {
AlertDialog.Builder mDialog = new AlertDialog.Builder(ctx);
mDialog.setTitle(ctx.getString(R.string.BTRequestTitle));
mDialog.setMessage(ctx.getString(R.string.BTRequestSummary));
mDialog.setPositiveButton(ctx.getString(R.string.Yes), new OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
if (DEBUG)
Log.i("BrazoRobotBT", "Turning on Bluetooth...");
mBluetoothAdapter.enable(); // Enciendo el Bluetooth
}
});
mDialog.setNegativeButton(ctx.getString(R.string.No), new OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
if (DEBUG)
Log.i("BrazoRobotBT", "Exit");
mActivity.finish();
}
});
mDialog.show();
}
我在mDialog.show()收到以下异常。 ctx是我在构造函数中传递的活动上下文，我也尝试将mActivity ((Activity) ctx)传递给AlertDialog.Builder，但我得到了同样的例外。
对话框是要求用户启用蓝牙。我知道正确的方法是使用内置方法调用startActivityForResult（）但是我希望将所有内容都放在我的自定义类中，如果它不是一个Activity，我就不能在我的类上使用onActivityResult（）为什么我这样做。
为什么会这样？ AFAIK我在UI线程上创建对话框。我也尝试在onCreate()方法中创建对话框，但它仍然是相同的。
03-06 21:06:20.320: E/WindowManager(31411): Activity com.roboticarm.andres.BrazoRobot has leaked window com.android.internal.policy.impl.PhoneWindow$DecorView{4130de20 V.E..... R.....ID 0,0-495,244} that was originally added here
03-06 21:06:20.320: E/WindowManager(31411): android.view.WindowLeaked: Activity com.roboticarm.andres.BrazoRobot has leaked window com.android.internal.policy.impl.PhoneWindow$DecorView{4130de20 V.E..... R.....ID 0,0-495,244} that was originally added here
03-06 21:06:20.320: E/WindowManager(31411): at android.view.ViewRootImpl.<init>(ViewRootImpl.java:354)
03-06 21:06:20.320: E/WindowManager(31411): at android.view.WindowManagerGlobal.addView(WindowManagerGlobal.java:216)
03-06 21:06:20.320: E/WindowManager(31411): at android.view.WindowManagerImpl.addView(WindowManagerImpl.java:69)
03-06 21:06:20.320: E/WindowManager(31411): at android.app.Dialog.show(Dialog.java:281)
03-06 21:06:20.320: E/WindowManager(31411): at android.app.AlertDialog$Builder.show(AlertDialog.java:951)
03-06 21:06:20.320: E/WindowManager(31411): at com.bluetoothutils.andres.BluetoothHelper.connect(BluetoothHelper.java:119)
03-06 21:06:20.320: E/WindowManager(31411): at com.roboticarm.andres.BrazoRobot.onResume(BrazoRobot.java:247)
03-06 21:06:20.320: E/WindowManager(31411): at android.app.Instrumentation.callActivityOnResume(Instrumentation.java:1185)
03-06 21:06:20.320: E/WindowManager(31411): at android.app.Activity.performResume(Activity.java:5217)
03-06 21:06:20.320: E/WindowManager(31411): at android.app.ActivityThread.performResumeActivity(ActivityThread.java:2862)
03-06 21:06:20.320: E/WindowManager(31411): at android.app.ActivityThread.handleResumeActivity(ActivityThread.java:2901)
03-06 21:06:20.320: E/WindowManager(31411): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2364)
03-06 21:06:20.320: E/WindowManager(31411): at android.app.ActivityThread.access$600(ActivityThread.java:153)
03-06 21:06:20.320: E/WindowManager(31411): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1247)
03-06 21:06:20.320: E/WindowManager(31411): at android.os.Handler.dispatchMessage(Handler.java:99)
03-06 21:06:20.320: E/WindowManager(31411): at android.os.Looper.loop(Looper.java:137)
03-06 21:06:20.320: E/WindowManager(31411): at android.app.ActivityThread.main(ActivityThread.java:5204)
03-06 21:06:20.320: E/WindowManager(31411): at java.lang.reflect.Method.invokeNative(Native Method)
03-06 21:06:20.320: E/WindowManager(31411): at java.lang.reflect.Method.invoke(Method.java:511)
03-06 21:06:20.320: E/WindowManager(31411): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:799)
03-06 21:06:20.320: E/WindowManager(31411): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:566)
03-06 21:06:20.320: E/WindowManager(31411): at dalvik.system.NativeStart.main(Native Method)
编辑1（onWindowFocusChanged）
按照建议尝试此代码：
@Override
public void onWindowFocusChanged(boolean hasFocus) {
super.onWindowFocusChanged(hasFocus);
if(hasFocus){
// Conecto al dispositivo bluetooth
mBluetoothHelper = new BluetoothHelper(this, "linvor");
mBluetoothHelper.connect();
if(DEBUG) Log.i("BrazoRobotBT", "Interface");
mBluetoothHelper.setOnNewBluetoothDataReceived(this);
setPreferences();
// Indico que entro en el Analizador lógico
mBluetoothHelper.write(logicAnalyzerMode);
}
}
但我一直得到完全相同的错误。
编辑2（活动测试）
我尝试在Activity中的onCreate（）和onResume（）中创建一个Dialog，并使用这个简单的代码完美地创建它：
public class CustomDialog extends Activity{
private static final boolean DEBUG = true;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
AlertDialog.Builder mDialog = new AlertDialog.Builder(this);
mDialog.setTitle(getString(R.string.BTRequestTitle));
mDialog.setMessage(getString(R.string.BTRequestSummary));
mDialog.setPositiveButton(getString(R.string.Yes), new OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
if(DEBUG) Log.i("BrazoRobotBT", "Turning on Bluetooth...");
}
});
mDialog.setNegativeButton(getString(R.string.No), new OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
if(DEBUG) Log.i("BrazoRobotBT", "Exit");
}
});
mDialog.show();
}
}
But, if I put this code inside my class method called from my Activity I get the exception.
编辑3（奇怪事实）
这是我的connect（）方法，当我从我的Activity中调用它时会出现异常，并显示对话框：
public void connect (){
// Compruebo que el dispositivo tenga Bluetooth
mBluetoothAdapter = BluetoothAdapter.getDefaultAdapter();
if (mBluetoothAdapter == null) {
// Si no hay Bluetooth en el dispositivo muestro un dialogo alertando al usuario y salgo de la Activity
AlertDialog.Builder dialog = new AlertDialog.Builder(mActivity);
dialog.setTitle(ctx.getString(R.string.NoBTAlertTitle));
dialog.setMessage(ctx.getString(R.string.NoBTAlertText));
dialog.setPositiveButton(ctx.getString(R.string.Ok), new OnClickListener(){
@Override
public void onClick(DialogInterface dialog, int which) {
mActivity.finish(); // Cierro porque no existe un módulo Bluetooth
}
});
}
// Si el dispositivo tiene Bluetooth me conecto
else{
// Compruebo que el Bluetooth esté activado, sino pido al usuario que lo active
if (!mBluetoothAdapter.isEnabled()) {
//mActivity.startActivity(new Intent(mActivity, CustomDialog.class));
AlertDialog.Builder mDialog = new AlertDialog.Builder(ctx);
mDialog.setTitle(ctx.getString(R.string.BTRequestTitle));
mDialog.setMessage(ctx.getString(R.string.BTRequestSummary));
mDialog.setPositiveButton(ctx.getString(R.string.Yes), new OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
if(DEBUG) Log.i("BrazoRobotBT", "Turning on Bluetooth...");
mBluetoothAdapter.enable(); // Enciendo el Bluetooth
}
});
mDialog.setNegativeButton(ctx.getString(R.string.No), new OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
if(DEBUG) Log.i("BrazoRobotBT", "Exit");
mActivity.finish();
}
});
mDialog.show();
}
// Compruebo si el dispositivo no esta en los dispositivos emparejados (paired)
Set<BluetoothDevice> pairedDevices = mBluetoothAdapter.getBondedDevices();
if (pairedDevices.size() > 0) {
// Loop a travez de los dispositivos emparejados (paired)
for (BluetoothDevice device : pairedDevices) {
if(DEBUG) Log.i("BrazoRobotBT", "Name: " + device.getName() + " -- Address: " + device.getAddress());
// Si el dispositivo coincide con el que busco lo asigno
if(device.getName().equals(bluetoothName)){
mBluetoothDevice = device;
// Establezco una conexión Bluetooth para enviar datos
establishConnection();
break;
}
}
}
// Sino salgo, debe estar en los dispositivos emparejados
else{
mActivity.finish();
}
}
}
但是如果我创建一个单独的方法并且也从Activity调用，那么在显示Dialog时我没有得到异常：
public void dialog(){
AlertDialog.Builder mDialog = new AlertDialog.Builder(ctx);
mDialog.setTitle(ctx.getString(R.string.BTRequestTitle));
mDialog.setMessage(ctx.getString(R.string.BTRequestSummary));
mDialog.setPositiveButton(ctx.getString(R.string.Yes), new OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
if(DEBUG) Log.i("BrazoRobotBT", "Turning on Bluetooth...");
}
});
mDialog.setNegativeButton(ctx.getString(R.string.No), new OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
if(DEBUG) Log.i("BrazoRobotBT", "Exit");
mActivity.finish();
}
});
mDialog.show();
}
并使用它：
mCustomClass.dialog(); // Dialog is shown, no exception
答案 0 :(得分：0)
为了避免此错误，您应该在活动的 onStop 方法中调用mDialog.dismiss()。
原因：因为你不能简单地完成对话框所有者活动，或者在没有正确处理对话窗口的情况下跳转到新活动。
答案 1 :(得分：0)
好好休息一下后我解决了。我的错了。问题基本上是我出现了对话框，在显示之前我完成了活动：
public void connect (){
// Compruebo que el dispositivo tenga Bluetooth
mBluetoothAdapter = BluetoothAdapter.getDefaultAdapter();
if (mBluetoothAdapter == null) {
// Si no hay Bluetooth en el dispositivo muestro un dialogo alertando al usuario y salgo de la Activity
AlertDialog.Builder dialog = new AlertDialog.Builder(mActivity);
dialog.setTitle(ctx.getString(R.string.NoBTAlertTitle));
dialog.setMessage(ctx.getString(R.string.NoBTAlertText));
dialog.setPositiveButton(ctx.getString(R.string.Ok), new OnClickListener(){
@Override
public void onClick(DialogInterface dialog, int which) {
mActivity.finish(); // Cierro porque no existe un módulo Bluetooth
}
});
}
// Si el dispositivo tiene Bluetooth me conecto
else{
// Compruebo que el Bluetooth esté activado, sino pido al usuario que lo active
if (!mBluetoothAdapter.isEnabled()) {
//mActivity.startActivity(new Intent(mActivity, CustomDialog.class));
AlertDialog.Builder mDialog = new AlertDialog.Builder(ctx);
mDialog.setTitle(ctx.getString(R.string.BTRequestTitle));
mDialog.setMessage(ctx.getString(R.string.BTRequestSummary));
mDialog.setPositiveButton(ctx.getString(R.string.Yes), new OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
if(DEBUG) Log.i("BrazoRobotBT", "Turning on Bluetooth...");
mBluetoothAdapter.enable(); // Enciendo el Bluetooth
}
});
mDialog.setNegativeButton(ctx.getString(R.string.No), new OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
if(DEBUG) Log.i("BrazoRobotBT", "Exit");
mActivity.finish();
}
});
mDialog.show();
}
// Compruebo si el dispositivo no esta en los dispositivos emparejados (paired)
Set<BluetoothDevice> pairedDevices = mBluetoothAdapter.getBondedDevices();
if (pairedDevices.size() > 0) {
// Loop a travez de los dispositivos emparejados (paired)
for (BluetoothDevice device : pairedDevices) {
if(DEBUG) Log.i("BrazoRobotBT", "Name: " + device.getName() + " -- Address: " + device.getAddress());
// Si el dispositivo coincide con el que busco lo asigno
if(device.getName().equals(bluetoothName)){
mBluetoothDevice = device;
// Establezco una conexión Bluetooth para enviar datos
establishConnection();
break;
}
}
}
// Sino salgo, debe estar en los dispositivos emparejados
else{
mActivity.finish();
}
}
}
我在'mDialog.show（）上显示对话框但是蓝牙仍然没有启用，直到我按下确定按钮，所以没有配对的设备，所以我完成了活动，但对话框仍在绘制，所以我得到了例外。我知道愚蠢的错误，有时我应该休息一下。
所以'connect（）'方法现在是：
public void connect (){
if(DEBUG) Log.i("BrazoRobotBT", "connect()...");
// Compruebo que el dispositivo tenga Bluetooth
mBluetoothAdapter = BluetoothAdapter.getDefaultAdapter();
if (mBluetoothAdapter == null) {
// Si no hay Bluetooth en el dispositivo muestro un dialogo alertando al usuario y salgo de la Activity
AlertDialog.Builder dialog = new AlertDialog.Builder(mActivity);
dialog.setTitle(ctx.getString(R.string.NoBTAlertTitle));
dialog.setMessage(ctx.getString(R.string.NoBTAlertText));
dialog.setPositiveButton(ctx.getString(R.string.Ok), new OnClickListener(){
@Override
public void onClick(DialogInterface dialog, int which) {
if(DEBUG) Log.i("BrazoRobotBT", "No bluetooth on device");
mActivity.finish(); // Cierro porque no existe un módulo Bluetooth
}
});
}
// Si el dispositivo tiene Bluetooth me conecto
else{
// Compruebo que el Bluetooth esté activado, sino pido al usuario que lo active
if (!mBluetoothAdapter.isEnabled()) {
final AlertDialog.Builder mDialog = new AlertDialog.Builder(ctx);
mDialog.setTitle(ctx.getString(R.string.BTRequestTitle));
mDialog.setMessage(ctx.getString(R.string.BTRequestSummary));
mDialog.setPositiveButton(ctx.getString(R.string.Yes), new OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
if(DEBUG) Log.i("BrazoRobotBT", "Turning on Bluetooth...");
mBluetoothAdapter.enable(); // Enciendo el Bluetooth
// Espero a que encienda el Bluetooth
while(!mBluetoothAdapter.isEnabled());
// Compruebo si el dispositivo no esta en los dispositivos emparejados (paired)
Set<BluetoothDevice> pairedDevices = mBluetoothAdapter.getBondedDevices();
if (pairedDevices.size() > 0) {
// Loop a travez de los dispositivos emparejados (paired)
for (BluetoothDevice device : pairedDevices) {
if(DEBUG) Log.i("BrazoRobotBT", "Name: " + device.getName() + " -- Address: " + device.getAddress());
// Si el dispositivo coincide con el que busco lo asigno
if(device.getName().equals(bluetoothName)){
mBluetoothDevice = device;
// Establezco una conexión Bluetooth para enviar datos
establishConnection();
break;
}
}
}
// Sino salgo, debe estar en los dispositivos emparejados
else{
if(DEBUG) Log.i("BrazoRobotBT", "Finish Activity not in paired devices");
mBluetoothAdapter.disable();
mActivity.finish();
}
}
});
mDialog.setNegativeButton(ctx.getString(R.string.No), new OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
if(DEBUG) Log.i("BrazoRobotBT", "Exit");
mActivity.finish();
}
});
mDialog.show();
}
}
}
它正常运作并且符合预期。非常感谢Waqas的帮助，但我在AlertDialog.Builder上没有'mDialog.dismiss（）'方法，因为它是自动完成的。