我自己写了一个: 可是没法自动保存RadioButtonPreference的信息,每次打开该应用时,所有的RadioButton都是没选中的。下面是我的代码,我是按照CheckboxPreference来写的:
package com.lenovo.tmp.ftp;import android.content.Context;
import android.content.SharedPreferences;
import android.content.res.TypedArray;
import android.os.Parcel;
import android.os.Parcelable;
import android.preference.Preference;
import android.util.AttributeSet;
import android.view.View;
import android.widget.Checkable;/**
* 图片选项,用于设置图片和边框
*
* @author Winter Lau
*/
public class RadioPreference extends Preference { private CharSequence mSummaryOn;
private CharSequence mSummaryOff; private boolean mChecked; private boolean mDisableDependentsState; public RadioPreference(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
} public RadioPreference(Context context, AttributeSet attrs) {
super(context, attrs);
} public RadioPreference(Context context) {
super(context);
}
@Override
public boolean isPersistent() {
return false;
} @Override
protected void onBindView(View view) {
super.onBindView(view);
View checkboxView = view.findViewById(com.lenovo.tmp.R.id.radiobutton);
if (checkboxView != null && checkboxView instanceof Checkable) {
((Checkable) checkboxView).setChecked(mChecked);
}
} @Override
protected void onClick() {
super.onClick();
boolean newValue = !isChecked();
setChecked(newValue);
} /**
* Sets the checked state and saves it to the {@link SharedPreferences}.
*
* @param checked
* The checked state.
*/
public void setChecked(boolean checked) {
if (mChecked != checked) {
mChecked = checked;
persistBoolean(checked);
notifyDependencyChange(shouldDisableDependents());
notifyChanged();
}
} /**
* Returns the checked state.
*
* @return The checked state.
*/
public boolean isChecked() {
return mChecked;
} @Override
public boolean shouldDisableDependents() {
boolean shouldDisable = mDisableDependentsState ? mChecked : !mChecked;
return shouldDisable || super.shouldDisableDependents();
} /**
* Sets the summary to be shown when checked.
*
* @param summary
* The summary to be shown when checked.
*/
public void setSummaryOn(CharSequence summary) {
mSummaryOn = summary;
if (isChecked()) {
notifyChanged();
}
} /**
* @see #setSummaryOn(CharSequence)
* @param summaryResId
* The summary as a resource.
*/
public void setSummaryOn(int summaryResId) {
setSummaryOn(getContext().getString(summaryResId));
} /**
* Returns the summary to be shown when checked.
*
* @return The summary.
*/
public CharSequence getSummaryOn() {
return mSummaryOn;
} /**
* Sets the summary to be shown when unchecked.
*
* @param summary
* The summary to be shown when unchecked.
*/
public void setSummaryOff(CharSequence summary) {
mSummaryOff = summary;
if (!isChecked()) {
notifyChanged();
}
} /**
* @see #setSummaryOff(CharSequence)
* @param summaryResId
* The summary as a resource.
*/
public void setSummaryOff(int summaryResId) {
setSummaryOff(getContext().getString(summaryResId));
} /**
* Returns the summary to be shown when unchecked.
*
* @return The summary.
*/
public CharSequence getSummaryOff() {
return mSummaryOff;
} /**
* Returns whether dependents are disabled when this preference is on (
* {@code true}) or when this preference is off ({@code false}).
*
* @return Whether dependents are disabled when this preference is on (
* {@code true}) or when this preference is off ({@code false}).
*/
public boolean getDisableDependentsState() {
return mDisableDependentsState;
} /**
* Sets whether dependents are disabled when this preference is on (
* {@code true}) or when this preference is off ({@code false}).
*
* @param disableDependentsState
* The preference state that should disable dependents.
*/
public void setDisableDependentsState(boolean disableDependentsState) {
mDisableDependentsState = disableDependentsState;
} @Override
protected Object onGetDefaultValue(TypedArray a, int index) {
return a.getBoolean(index, false);
} @Override
protected void onSetInitialValue(boolean restoreValue, Object defaultValue) {
setChecked(restoreValue ? getPersistedBoolean(mChecked)
: (Boolean) defaultValue);
} @Override
protected Parcelable onSaveInstanceState() {
final Parcelable superState = super.onSaveInstanceState();
if (isPersistent()) {
// No need to save instance state since it's persistent
return superState;
} final SavedState myState = new SavedState(superState);
myState.checked = isChecked();
return myState;
} @Override
protected void onRestoreInstanceState(Parcelable state) {
if (state == null || !state.getClass().equals(SavedState.class)) {
// Didn't save state for us in onSaveInstanceState
super.onRestoreInstanceState(state);
return;
} SavedState myState = (SavedState) state;
super.onRestoreInstanceState(myState.getSuperState());
setChecked(myState.checked);
} private static class SavedState extends BaseSavedState {
boolean checked; public SavedState(Parcel source) {
super(source);
checked = source.readInt() == 1;
} @Override
public void writeToParcel(Parcel dest, int flags) {
super.writeToParcel(dest, flags);
dest.writeInt(checked ? 1 : 0);
} public SavedState(Parcelable superState) {
super(superState);
} public static final Parcelable.Creator<SavedState> CREATOR = new Parcelable.Creator<SavedState>() {
public SavedState createFromParcel(Parcel in) {
return new SavedState(in);
} public SavedState[] newArray(int size) {
return new SavedState[size];
}
};
}}
package com.lenovo.tmp.ftp;import android.content.Context;
import android.content.SharedPreferences;
import android.content.res.TypedArray;
import android.os.Parcel;
import android.os.Parcelable;
import android.preference.Preference;
import android.util.AttributeSet;
import android.view.View;
import android.widget.Checkable;/**
* 图片选项,用于设置图片和边框
*
* @author Winter Lau
*/
public class RadioPreference extends Preference { private CharSequence mSummaryOn;
private CharSequence mSummaryOff; private boolean mChecked; private boolean mDisableDependentsState; public RadioPreference(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
} public RadioPreference(Context context, AttributeSet attrs) {
super(context, attrs);
} public RadioPreference(Context context) {
super(context);
}
@Override
public boolean isPersistent() {
return false;
} @Override
protected void onBindView(View view) {
super.onBindView(view);
View checkboxView = view.findViewById(com.lenovo.tmp.R.id.radiobutton);
if (checkboxView != null && checkboxView instanceof Checkable) {
((Checkable) checkboxView).setChecked(mChecked);
}
} @Override
protected void onClick() {
super.onClick();
boolean newValue = !isChecked();
setChecked(newValue);
} /**
* Sets the checked state and saves it to the {@link SharedPreferences}.
*
* @param checked
* The checked state.
*/
public void setChecked(boolean checked) {
if (mChecked != checked) {
mChecked = checked;
persistBoolean(checked);
notifyDependencyChange(shouldDisableDependents());
notifyChanged();
}
} /**
* Returns the checked state.
*
* @return The checked state.
*/
public boolean isChecked() {
return mChecked;
} @Override
public boolean shouldDisableDependents() {
boolean shouldDisable = mDisableDependentsState ? mChecked : !mChecked;
return shouldDisable || super.shouldDisableDependents();
} /**
* Sets the summary to be shown when checked.
*
* @param summary
* The summary to be shown when checked.
*/
public void setSummaryOn(CharSequence summary) {
mSummaryOn = summary;
if (isChecked()) {
notifyChanged();
}
} /**
* @see #setSummaryOn(CharSequence)
* @param summaryResId
* The summary as a resource.
*/
public void setSummaryOn(int summaryResId) {
setSummaryOn(getContext().getString(summaryResId));
} /**
* Returns the summary to be shown when checked.
*
* @return The summary.
*/
public CharSequence getSummaryOn() {
return mSummaryOn;
} /**
* Sets the summary to be shown when unchecked.
*
* @param summary
* The summary to be shown when unchecked.
*/
public void setSummaryOff(CharSequence summary) {
mSummaryOff = summary;
if (!isChecked()) {
notifyChanged();
}
} /**
* @see #setSummaryOff(CharSequence)
* @param summaryResId
* The summary as a resource.
*/
public void setSummaryOff(int summaryResId) {
setSummaryOff(getContext().getString(summaryResId));
} /**
* Returns the summary to be shown when unchecked.
*
* @return The summary.
*/
public CharSequence getSummaryOff() {
return mSummaryOff;
} /**
* Returns whether dependents are disabled when this preference is on (
* {@code true}) or when this preference is off ({@code false}).
*
* @return Whether dependents are disabled when this preference is on (
* {@code true}) or when this preference is off ({@code false}).
*/
public boolean getDisableDependentsState() {
return mDisableDependentsState;
} /**
* Sets whether dependents are disabled when this preference is on (
* {@code true}) or when this preference is off ({@code false}).
*
* @param disableDependentsState
* The preference state that should disable dependents.
*/
public void setDisableDependentsState(boolean disableDependentsState) {
mDisableDependentsState = disableDependentsState;
} @Override
protected Object onGetDefaultValue(TypedArray a, int index) {
return a.getBoolean(index, false);
} @Override
protected void onSetInitialValue(boolean restoreValue, Object defaultValue) {
setChecked(restoreValue ? getPersistedBoolean(mChecked)
: (Boolean) defaultValue);
} @Override
protected Parcelable onSaveInstanceState() {
final Parcelable superState = super.onSaveInstanceState();
if (isPersistent()) {
// No need to save instance state since it's persistent
return superState;
} final SavedState myState = new SavedState(superState);
myState.checked = isChecked();
return myState;
} @Override
protected void onRestoreInstanceState(Parcelable state) {
if (state == null || !state.getClass().equals(SavedState.class)) {
// Didn't save state for us in onSaveInstanceState
super.onRestoreInstanceState(state);
return;
} SavedState myState = (SavedState) state;
super.onRestoreInstanceState(myState.getSuperState());
setChecked(myState.checked);
} private static class SavedState extends BaseSavedState {
boolean checked; public SavedState(Parcel source) {
super(source);
checked = source.readInt() == 1;
} @Override
public void writeToParcel(Parcel dest, int flags) {
super.writeToParcel(dest, flags);
dest.writeInt(checked ? 1 : 0);
} public SavedState(Parcelable superState) {
super(superState);
} public static final Parcelable.Creator<SavedState> CREATOR = new Parcelable.Creator<SavedState>() {
public SavedState createFromParcel(Parcel in) {
return new SavedState(in);
} public SavedState[] newArray(int size) {
return new SavedState[size];
}
};
}}
SharedPreferences.Editor editor = getEditor();
editor.putBoolean(getKey(), checked);
editor.commit();
你光改变UI的显示了,没有保存到preferences.xml配置文件中