Activity 的 LayoutInflater 已经安装了 Factory，所以我们无法安装 AppCompat 的
The Activity's LayoutInflater already has a Factory installed so we can not install AppCompat's
我在我的应用程序中使用 AppCompat 库 (com.android.support:appcompat-v7:22.1.0)。我在片段中创建了一个 ActionBar。当我单击菜单项时，它会显示一个警告对话框。这是我的代码：
@Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle item selection
switch (item.getItemId()) {
case R.id.action_new:
showFilterDialog();
return true;
case R.id.action_send:
new sendInventoryTask().execute();
return true;
default:
return super.onOptionsItemSelected(item);
}
}
还有我的 showInventoryDialog 方法：
private void showFilterInventoryDialog() {
AlertDialog.Builder alert = new AlertDialog.Builder(getActivity());
LayoutInflater inflater= getActivity().getLayoutInflater();
View v = inflater.inflate(R.layout.dialog_filter_inventory,null);
alert.setView(v);
alert.setTitle(getResources().getString(R.string.filters));
alert.setPositiveButton(getResources().getString(R.string.filter), new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int id) {
// TODO
}
});
alert.setNegativeButton(getResources().getString(R.string.cancel), null);
alert.show();
}
一切正常，但是当我点击菜单项时，logcat 显示错误：
I/AppCompatDelegate﹕ The Activity's LayoutInflater already has a Factory installed so we can not install AppCompat's
如何解决？
改变
inflater.inflate(R.layout.dialog_filter_inventory,null);
到
inflater.inflate(R.layout.dialog_filter_inventory,null,false);
在扩充对话框的情况下，我们不希望它附加到指定的 ViewGroup (== null)。
这可能会有所帮助。
第二次尝试
信息日志由AppCompatDelegateImplV7中的以下代码抛出：
@Override
public void installViewFactory() {
LayoutInflater layoutInflater = LayoutInflater.from(mContext);
if (layoutInflater.getFactory() == null) {
LayoutInflaterCompat.setFactory(layoutInflater, this);
} else {
Log.i(TAG, "The Activity's LayoutInflater already has a Factory installed"
+ " so we can not install AppCompat's");
}
}
会不会是您在代码的较早部分安装了工厂？
在这种情况下，您需要使用主题上下文，而不是
new AlertDialog.Builder(getActivity());
你必须做
new AlertDialog.Builder(getSupportActionBar().getThemedContext());
此外，您还需要遵循此处给出的父主题和 windowActionBar 提示 - support.v7.app.AlertDialog throws NullPointerException on dismiss
据我所知，每次您显示由 AlertDialog.Builder 创建的对话框时，appcompat 23.1.1 都会在 AppCompatDelegateImplV7 中调用 installViewFactory()。
调用堆栈：
at
android.support.v7.app.AppCompatDelegateImplV7.installViewFactory(AppCompatDelegateImplV7.java:970)
at
android.support.v7.app.AppCompatDialog.onCreate(AppCompatDialog.java:58)
at android.support.v7.app.AlertDialog.onCreate(AlertDialog.java:239)
at android.app.Dialog.dispatchOnCreate(Dialog.java:361) at
android.app.Dialog.show(Dialog.java:262) at
android.support.v7.app.AlertDialog$Builder.show(AlertDialog.java:902)
@Override
public void installViewFactory() {
LayoutInflater layoutInflater = LayoutInflater.from(mContext);
if (layoutInflater.getFactory() == null) {
LayoutInflaterCompat.setFactory(layoutInflater, this);
} else {
Log.i(TAG, "The Activity's LayoutInflater already has a Factory installed"
+ " so we can not install AppCompat's");
}
}
如您所见，一旦设置了工厂，它就会记录信息性消息。忽略它似乎很安全，但是当它填满你的日志时它会变得很烦人。
解决方案 - 错误 "The Activity's LayoutInflater already has a Factory installed so we can not install AppCompat's" 也可能是由于代码不正确造成的。在我的例子中，代码调用了 "super.onCreate(savedInstanceState)" 两次（代码错误），一旦重复调用被删除，错误就解决了。
这是我的错误日志：
02-29 04:54:40.706 4417-4417/com.projects.ajay.example2 I/AppCompatDelegate: The Activity's LayoutInflater already has a Factory installed so we can not install AppCompat's
02-29 04:54:40.709 4417-4417/? D/AndroidRuntime: Shutting down VM
02-29 04:54:40.715 4417-4417/? E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.projects.ajay.example2, PID: 4417
java.lang.RuntimeException: Unable to start activity ComponentInfo{com.projects.ajay.example2/com.projects.ajay.example2.MainActivity}: java.lang.IllegalStateException: Already attached
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2331)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2393)
at android.app.ActivityThread.access0(ActivityThread.java:151)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1309)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:135)
at android.app.ActivityThread.main(ActivityThread.java:5351)
at java.lang.reflect.Method.invoke(Native Method)
at java.lang.reflect.Method.invoke(Method.java:372)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:908)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:703)
Caused by: java.lang.IllegalStateException: Already attached
at android.support.v4.app.FragmentManagerImpl.attachController(FragmentManager.java:2025)
at android.support.v4.app.FragmentController.attachHost(FragmentController.java:95)
at android.support.v4.app.FragmentActivity.onCreate(FragmentActivity.java:276)
at android.support.v7.app.AppCompatActivity.onCreate(AppCompatActivity.java:61)
at com.projects.ajay.example2.MainActivity.onCreate(MainActivity.java:24)
at android.app.Activity.performCreate(Activity.java:6020)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1105)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2284)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2393)
at android.app.ActivityThread.access0(ActivityThread.java:151)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1309)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:135)
at android.app.ActivityThread.main(ActivityThread.java:5351)
at java.lang.reflect.Method.invoke(Native Method)
at java.lang.reflect.Method.invoke(Method.java:372)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:908)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:703)
02-29 04:54:40.727 4417-4417/? I/Process: Sending signal. PID: 4417 SIG: 9
我在我的应用程序中使用 AppCompat 库 (com.android.support:appcompat-v7:22.1.0)。我在片段中创建了一个 ActionBar。当我单击菜单项时，它会显示一个警告对话框。这是我的代码：
@Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle item selection
switch (item.getItemId()) {
case R.id.action_new:
showFilterDialog();
return true;
case R.id.action_send:
new sendInventoryTask().execute();
return true;
default:
return super.onOptionsItemSelected(item);
}
}
还有我的 showInventoryDialog 方法：
private void showFilterInventoryDialog() {
AlertDialog.Builder alert = new AlertDialog.Builder(getActivity());
LayoutInflater inflater= getActivity().getLayoutInflater();
View v = inflater.inflate(R.layout.dialog_filter_inventory,null);
alert.setView(v);
alert.setTitle(getResources().getString(R.string.filters));
alert.setPositiveButton(getResources().getString(R.string.filter), new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int id) {
// TODO
}
});
alert.setNegativeButton(getResources().getString(R.string.cancel), null);
alert.show();
}
一切正常，但是当我点击菜单项时，logcat 显示错误：
I/AppCompatDelegate﹕ The Activity's LayoutInflater already has a Factory installed so we can not install AppCompat's
如何解决？
改变
inflater.inflate(R.layout.dialog_filter_inventory,null);
到
inflater.inflate(R.layout.dialog_filter_inventory,null,false);
在扩充对话框的情况下，我们不希望它附加到指定的 ViewGroup (== null)。
这可能会有所帮助。
第二次尝试
信息日志由AppCompatDelegateImplV7中的以下代码抛出：
@Override
public void installViewFactory() {
LayoutInflater layoutInflater = LayoutInflater.from(mContext);
if (layoutInflater.getFactory() == null) {
LayoutInflaterCompat.setFactory(layoutInflater, this);
} else {
Log.i(TAG, "The Activity's LayoutInflater already has a Factory installed"
+ " so we can not install AppCompat's");
}
}
会不会是您在代码的较早部分安装了工厂？
在这种情况下，您需要使用主题上下文，而不是
new AlertDialog.Builder(getActivity());
你必须做
new AlertDialog.Builder(getSupportActionBar().getThemedContext());
此外，您还需要遵循此处给出的父主题和 windowActionBar 提示 - support.v7.app.AlertDialog throws NullPointerException on dismiss
据我所知，每次您显示由 AlertDialog.Builder 创建的对话框时，appcompat 23.1.1 都会在 AppCompatDelegateImplV7 中调用 installViewFactory()。
调用堆栈：
at android.support.v7.app.AppCompatDelegateImplV7.installViewFactory(AppCompatDelegateImplV7.java:970) at android.support.v7.app.AppCompatDialog.onCreate(AppCompatDialog.java:58) at android.support.v7.app.AlertDialog.onCreate(AlertDialog.java:239) at android.app.Dialog.dispatchOnCreate(Dialog.java:361) at android.app.Dialog.show(Dialog.java:262) at android.support.v7.app.AlertDialog$Builder.show(AlertDialog.java:902)
@Override
public void installViewFactory() {
LayoutInflater layoutInflater = LayoutInflater.from(mContext);
if (layoutInflater.getFactory() == null) {
LayoutInflaterCompat.setFactory(layoutInflater, this);
} else {
Log.i(TAG, "The Activity's LayoutInflater already has a Factory installed"
+ " so we can not install AppCompat's");
}
}
如您所见，一旦设置了工厂，它就会记录信息性消息。忽略它似乎很安全，但是当它填满你的日志时它会变得很烦人。
解决方案 - 错误 "The Activity's LayoutInflater already has a Factory installed so we can not install AppCompat's" 也可能是由于代码不正确造成的。在我的例子中，代码调用了 "super.onCreate(savedInstanceState)" 两次（代码错误），一旦重复调用被删除，错误就解决了。
这是我的错误日志：
02-29 04:54:40.706 4417-4417/com.projects.ajay.example2 I/AppCompatDelegate: The Activity's LayoutInflater already has a Factory installed so we can not install AppCompat's
02-29 04:54:40.709 4417-4417/? D/AndroidRuntime: Shutting down VM
02-29 04:54:40.715 4417-4417/? E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.projects.ajay.example2, PID: 4417
java.lang.RuntimeException: Unable to start activity ComponentInfo{com.projects.ajay.example2/com.projects.ajay.example2.MainActivity}: java.lang.IllegalStateException: Already attached
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2331)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2393)
at android.app.ActivityThread.access0(ActivityThread.java:151)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1309)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:135)
at android.app.ActivityThread.main(ActivityThread.java:5351)
at java.lang.reflect.Method.invoke(Native Method)
at java.lang.reflect.Method.invoke(Method.java:372)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:908)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:703)
Caused by: java.lang.IllegalStateException: Already attached
at android.support.v4.app.FragmentManagerImpl.attachController(FragmentManager.java:2025)
at android.support.v4.app.FragmentController.attachHost(FragmentController.java:95)
at android.support.v4.app.FragmentActivity.onCreate(FragmentActivity.java:276)
at android.support.v7.app.AppCompatActivity.onCreate(AppCompatActivity.java:61)
at com.projects.ajay.example2.MainActivity.onCreate(MainActivity.java:24)
at android.app.Activity.performCreate(Activity.java:6020)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1105)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2284)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2393)
at android.app.ActivityThread.access0(ActivityThread.java:151)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1309)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:135)
at android.app.ActivityThread.main(ActivityThread.java:5351)
at java.lang.reflect.Method.invoke(Native Method)
at java.lang.reflect.Method.invoke(Method.java:372)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:908)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:703)
02-29 04:54:40.727 4417-4417/? I/Process: Sending signal. PID: 4417 SIG: 9