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只修改本app的字体大小

不修改应用的字体大小 

在应用的基类里面修改。初始化然后重启

/**

 * 设置字体大小
 */
private void initFontScale() {Configuration configuration = getResources().getConfiguration();LogUtils.d("取出的字体大小是" + getSharedPreferences("text_size", MODE_PRIVATE).getFloat("text_size", 1.0f));configuration.fontScale = getSharedPreferences("text_size", MODE_PRIVATE).getFloat("text_size", 1.0f);//0.85 小, 1 标准大小, 1.15 大，1.3 超大 ，1.45 特大
    DisplayMetrics metrics = new DisplayMetrics();getWindowManager().getDefaultDisplay().getMetrics(metrics);metrics.scaledDensity = configuration.fontScale * metrics.density;getBaseContext().getResources().updateConfiguration(configuration, metrics);
}

。然后设置那里。

int currentSelect = 0;
if (fontScale == 1.0f) {currentSelect = 1;
} else if (fontScale == 0.8f) {currentSelect = 0;
} else {currentSelect = 2;
}
new AlertDialog.Builder(getContext()).setTitle(R.string.textsize_setting).setSingleChoiceItems(textSizes, currentSelect, null).setNegativeButton(android.R.string.cancel, null).setPositiveButton(android.R.string.ok, new DialogInterface.OnClickListener() {@Override
            public void onClick(DialogInterface dialog, int which) {which = ((AlertDialog) dialog).getListView().getCheckedItemPosition();SharedPreferences sp = getContext().getSharedPreferences("text_size", Context.MODE_PRIVATE);float text_size = 1.0f;switch (which) {case 0:text_size = 0.8f;break;case 1:text_size = 1.0f;break;case 2:text_size = 1.2f;break;}sp.edit().putFloat("text_size", text_size).commit();Toast.makeText(getContext(), R.string.setting_language_restart_app_hint, Toast.LENGTH_SHORT).show();binding.getRoot().postDelayed(new Runnable() {@Override
                    public void run() {AppUtils.restartApp(getActivity());}}, 1000);}}).show();