我想在public static Bitmap loadBitmapFromView(ScrollView v) {
Bitmap b = Bitmap.createBitmap(v.getWidth() , v.getChildAt(0).getHeight(), Bitmap.Config.ARGB_8888);
Canvas c = new Canvas(b);
v.draw(c);
return b;
}
中使用Fragment
,对于此问题,我想使用activity
。
我在getSupportFragment
中编写了以下代码,用于显示activity
:
fragment
我的SettingFragment代码:
android.support.v4.app.FragmentManager fragmentManager = getSupportFragmentManager();
android.support.v4.app.FragmentTransaction fragmentTransaction = fragmentManager.beginTransaction();
SettingsFragment settingsFragment = new SettingsFragment();
fragmentTransaction.add(R.id.frame_containerone, settingsFragment, "Setting");
fragmentTransaction.commit();
但是当使用import android.annotation.TargetApi;
import android.app.Activity;
import android.content.Context;
import android.content.SharedPreferences;
import android.os.Build;
import android.os.Bundle;
import android.preference.CheckBoxPreference;
import android.preference.PreferenceFragment;
import android.preference.PreferenceManager;
import android.util.Log;
import in.nouri.cameraalways.R;
import in.nouri.cameraalways.Service.OverlayService;
public class SettingsFragment extends PreferenceFragment {
SharedPreferences.OnSharedPreferenceChangeListener listener = null;
SharedPreferences defaultSharedPreference;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
addPreferencesFromResource(R.xml.preferences);
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
defaultSharedPreference = PreferenceManager.getDefaultSharedPreferences(getContext());
} else {
defaultSharedPreference = PreferenceManager.getDefaultSharedPreferences(getActivity());
}
Log.d("defaultpPref", defaultSharedPreference.getAll().toString());
}
@TargetApi(Build.VERSION_CODES.JELLY_BEAN)
@Override
public void onAttach(Activity activity) {
super.onAttach(activity);
listener = (SharedPreferences.OnSharedPreferenceChangeListener) activity;
}
@TargetApi(Build.VERSION_CODES.M)
@Override
public void onAttach(Context context) {
super.onAttach(context);
listener = (SharedPreferences.OnSharedPreferenceChangeListener) context;
}
@Override
public void onDetach() {
super.onDetach();
listener = null;
}
@Override
public void onResume() {
Log.d(getClass().getSimpleName(), "onResume");
super.onResume();
getPreferenceScreen().getSharedPreferences()
.registerOnSharedPreferenceChangeListener(listener);
CheckBoxPreference preference_enabled = (CheckBoxPreference) this.findPreference(getString(R.string.key_pref_enabled));
preference_enabled.setChecked(OverlayService.isRunning());
}
@Override
public void onPause() {
super.onPause();
getPreferenceScreen().getSharedPreferences()
.unregisterOnSharedPreferenceChangeListener(listener);
}
}
中的上述代码(用于活动中的片段)时,它会向我显示以下消息:
我该如何解决这个问题?
答案 0 :(得分:0)
您的SettingsFragment是android.app.Fragment
类的子类,而不是android.support.v4.app.Fragment
。更改片段中的import语句,你就可以了。
<强>更新强>
而不是import android.preference.PreferenceFragment;
在“设置”片段中使用import android.support.v7.preference.PreferenceFragmentCompat;
。
请注意,它需要compile 'com.android.support:preference-v7:24.2.1'
在你的app.gradle文件中
答案 1 :(得分:0)
在SettingsFragment中创建SettingsFragment的实例:
initialize
将其称为您的活动,如下所示:
public static SettingsFragment getInstance() {
return new SettingsFragment ();
}