我尝试了所有解决方案，但似乎没有一个对我有用-.-
我的手机运行的是Android 5.0.2版本，这就是我要尝试的做法。
我想从我的活动中打开一个对话框片段，如下所示：
SiteRadiusDialog dialog = SiteRadiusDialog.newInstance();
dialog.setRadiusListener(this);
dialog.show(getSupportFragmentManager(), "RadiusDialog");
这是我的SiteRadiusDialog：
public class SiteRadiusDialog extends android.support.v4.app.DialogFragment {
private SeekBar radiusSeekBar;
private TextView tvProgress;
private Button minus;
private Button plus;
private SiteRadiusChangeListener listener;
private int radius;
private int finalProgress;
public static SiteRadiusDialog newInstance() {
return new SiteRadiusDialog();
}
public void setRadiusListener(SiteRadiusChangeListener listener) {
this.listener = listener;
}
@Nullable
@Override
public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
getDialog().requestWindowFeature(Window.FEATURE_NO_TITLE);
return inflater.inflate(R.layout.dialog_site_radius, container);
}
@NonNull
@Override
public Dialog onCreateDialog(Bundle savedInstanceState) {
Context context = getActivity();
LayoutInflater inflater = LayoutInflater.from(context);
AlertDialog.Builder builder = new AlertDialog.Builder(context);
builder.setTitle(R.string.radius_change_title);
View dialogView = inflater.inflate(R.layout.dialog_site_radius, null);
builder.setView(dialogView);
radiusSeekBar = dialogView.findViewById(R.id.seekBar);
tvProgress = dialogView.findViewById(R.id.progresText);
plus = dialogView.findViewById(R.id.plus);
minus = dialogView.findViewById(R.id.minus);
radiusSeekBar.setProgress(SrsSettings.getConfiguration().getRadius());
finalProgress = radiusSeekBar.getProgress();
tvProgress.setText(getString(R.string.radius_change_text, SrsSettings.getConfiguration().getRadius()));
radiusSeekBar.setOnSeekBarChangeListener(new SeekBar.OnSeekBarChangeListener() {
@Override
public void onProgressChanged(SeekBar seekBar, int progress, boolean b) {
if (b) {
progress = Math.round(progress / 500) * 500;
seekBar.setProgress(progress);
finalProgress = progress;
radiusSeekBar.setProgress(finalProgress);
radiusSeekBar.post(new Runnable() {
@Override
public void run() {
radiusSeekBar.setProgress(finalProgress);
}
});
updateText(finalProgress);
}
}
@Override
public void onStartTrackingTouch(SeekBar seekBar) {
}
@Override
public void onStopTrackingTouch(SeekBar seekBar) {
}
});
plus.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
if (finalProgress < 15000) {
finalProgress += 500;
radiusSeekBar.setProgress(finalProgress);
radiusSeekBar.post(new Runnable() {
@Override
public void run() {
radiusSeekBar.setProgress(finalProgress);
}
});
updateText(finalProgress);
}
}
});
minus.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
if (finalProgress > 500) {
finalProgress -= 500;
radiusSeekBar.setProgress(finalProgress);
updateText(finalProgress);
}
}
});
builder.setPositiveButton("Ok", (dialog, i) -> {
if (listener != null) {
listener.onRadiusChanged(radius);
}
dismiss();
});
builder.setNegativeButton("Cancel", null);
return builder.create();
}
private void updateText(int progress) {
tvProgress.setText(getString(R.string.radius_change_text, progress));
radius = progress;
}
}
我根本不想隐藏标题或任何内容，所有功能都可以在Android> 5上运行，但是在该版本上，它崩溃了，这是一个例外：
05-13 14:28:56.953 9221-9221/com.---.---.---E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.---.---.---, PID: 9221
android.util.AndroidRuntimeException: requestFeature() must be called before adding content
at com.android.internal.policy.impl.PhoneWindow.requestFeature(PhoneWindow.java:373)
at com.android.internal.app.AlertController.installContent(AlertController.java:244)
at android.app.AlertDialog.onCreate(AlertDialog.java:356)
at android.app.Dialog.dispatchOnCreate(Dialog.java:465)
at android.app.Dialog.show(Dialog.java:288)
at android.support.v4.app.DialogFragment.onStart(DialogFragment.java:416)
at android.support.v4.app.Fragment.performStart(Fragment.java:2380)
at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1458)
at android.support.v4.app.FragmentManagerImpl.moveFragmentToExpectedState(FragmentManager.java:1740)
at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1809)
at android.support.v4.app.BackStackRecord.executeOps(BackStackRecord.java:799)
at android.support.v4.app.FragmentManagerImpl.executeOps(FragmentManager.java:2580)
at android.support.v4.app.FragmentManagerImpl.executeOpsTogether(FragmentManager.java:2367)
at android.support.v4.app.FragmentManagerImpl.removeRedundantOperationsAndExecute(FragmentManager.java:2322)
at android.support.v4.app.FragmentManagerImpl.execPendingActions(FragmentManager.java:2229)
at android.support.v4.app.FragmentManagerImpl$1.run(FragmentManager.java:700)
at android.os.Handler.handleCallback(Handler.java:739)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:145)
at android.app.ActivityThread.main(ActivityThread.java:6145)
at java.lang.reflect.Method.invoke(Native Method)
at java.lang.reflect.Method.invoke(Method.java:372)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1399)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1194)
答案 0 :(得分：0)
我找到了问题，覆盖onCreateView和onCreateDialog都导致了该问题。我只是删除了onCreateView，一切都正常了。