import android.support.v7.internal.view.ContextThemeWrapper; //导入依赖的package包/类
public void setDropDownViewTheme(android.content.res.Resources.Theme theme)
{
    if (theme == null)
    {
        mDropDownInflater = null;
        return;
    }
    if (theme == mContext.getTheme())
    {
        mDropDownInflater = mInflater;
        return;
    } else
    {
        mDropDownInflater = LayoutInflater.from(new ContextThemeWrapper(mContext, theme));
        return;
    }
}
 

import android.support.v7.internal.view.ContextThemeWrapper; //导入依赖的package包/类
/**
 * Get AppCompatActivity from context
 *
 * @param context
 * @return AppCompatActivity if it's not null
 */
public static AppCompatActivity getAppCompActivity(Context context) {
    if (context == null) return null;
    if (context instanceof AppCompatActivity) {
        return (AppCompatActivity) context;
    } else if (context instanceof ContextThemeWrapper) {
        return getAppCompActivity(((ContextThemeWrapper) context).getBaseContext());
    }
    return null;
}
 

import android.support.v7.internal.view.ContextThemeWrapper; //导入依赖的package包/类
public static AlertDialog createDialog(Activity activity, int type) {
        ContextThemeWrapper wrapper = new ContextThemeWrapper(activity, android.R.style.Theme_Holo);
        AlertDialog.Builder builder = new AlertDialog.Builder(wrapper);
        LayoutInflater inflater = activity.getLayoutInflater();
        switch (type) {
            case LOADING_DIALOG:
                builder.setView(inflater.inflate(R.layout.loading_dialog, null));
                break;
            case BACKUP_DIALOG:
                builder.setView(inflater.inflate(R.layout.backup_dialog, null));
                break;
            case SAVING_DIALOG:
                builder.setView(inflater.inflate(R.layout.saving_dialog, null));
                break;
            case INFO_DIALOG:
                final SharedPreferences sharedPreferences = activity.getSharedPreferences(FragmentActivity.PREFERENCES_NAME, FragmentActivity.MODE_PRIVATE);
                View view = View.inflate(activity, R.layout.info_dialog_view, null);
                final CheckBox infoDialogCheckBox = (CheckBox) view.findViewById(R.id.infoDialogCheckBox);
                builder
                        .setMessage(R.string.dialog_info_message)
                        .setView(view)
//                        .setView(view,16,16,16,16)
                        .setPositiveButton("OK", new DialogInterface.OnClickListener() {
                            @Override
                            public void onClick(DialogInterface dialog, int which) {
                                if (infoDialogCheckBox.isChecked()) {
                                    SharedPreferences.Editor editor = sharedPreferences.edit();
                                    editor.putBoolean(FragmentActivity.INFO_DIALOG_KEY, true);
                                    editor.apply();
                                }
                                dialog.dismiss();
                            }
                        });
                break;
        }
        return builder.create();
    }