Android PreferenceScreen
https://blog.csdn.net/weixin_43529377/article/details/98963095
PreferenceScreen和fragment结合
获取PreferenceScreen 的上下文
final Context context = pref.getContext();
一、监听事件
1.1、onPreferenceChange
public boolean onPreferenceChange(Preference preference, Object objValue) { return false; }
说 明： 当Preference的元素值发送改变时，触发该事件。
返回值： true 代表将新值写入sharedPreference文件中。
false 则不将新值写入sharedPreference文件。
1.2、onPreferenceClick
public boolean onPreferenceClick(Preference preference) { return false; }
说明：当点击控件时触发发生，可以做相应操作。
参数说明： preference 点击的对象。
返回值：true，不执行onPreferenceTreeClick
1.3、onPreferenceTreeClick
public boolean onPreferenceTreeClick(PreferenceScreen preferenceScreen, Preference preference) {
return super.onPreferenceTreeClick(preferenceScreen, preference);
}
说 明： 当Preference控件被点击时，触发该方法。
参数说明： preference 点击的对象。
返 回 值： true 代表点击事件已成功捕捉，无须执行默认动作或返回上层调用链。 例如， 不跳转至默认Intent。
false 代表执行默认动作并且返回上层调用链。例如，跳转至默认Intent。
1.4、点击某个Preference控件后，会先回调onPreferenceChange()方法，即是否保存值，
然后再回调onPreferenceClick以及onPreferenceTreeClick()方法，因此在onPreferenceClick和onPreferenceTreeClick方法中我们得到的控件值就是最新的Preference控件值。
二、daemo
2.1、activity_main.xml
2.2、R.xml.preferences
<?xml version="1.0" encoding="utf-8"?>
2.3、MainActivity.java
package com.gatsby.preferencesreen;
import android.app.Activity;
import android.os.Bundle;
import android.preference.CheckBoxPreference;
import android.preference.Preference;
import android.preference.Preference.OnPreferenceChangeListener;
import android.preference.Preference.OnPreferenceClickListener;
import android.preference.PreferenceFragment;
import android.preference.PreferenceScreen;
import android.util.Log;
public class MainActivity extends Activity {
private static final String KEY_CHECKBOX = "checkbox_preference";
private static final String KEY_PREFERENCE = "preference";
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
}
public static class SettingsFragment extends PreferenceFragment
implements OnPreferenceChangeListener, OnPreferenceClickListener {
CheckBoxPreference checkbox_preference;
Preference preference;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
addPreferencesFromResource(R.xml.preferences);
checkbox_preference = (CheckBoxPreference) findPreference(KEY_CHECKBOX);
checkbox_preference.setOnPreferenceChangeListener(this);
preference = (Preference) findPreference(KEY_PREFERENCE);
preference.setOnPreferenceClickListener(this);
}
@Override
public boolean onPreferenceChange(Preference preference, Object objValue) {
// TODO Auto-generated method stub
final String key = preference.getKey();
if (KEY_CHECKBOX.equals(key)) {
boolean isCheck = (Boolean) objValue;
if (isCheck) {
Log.d("gatsby", "isCheck");
} else {
Log.d("gatsby", "not Check");
}
}
return true;
}
@Override
public boolean onPreferenceClick(Preference preference) {
// TODO Auto-generated method stub
final String key = preference.getKey();
if (KEY_PREFERENCE.equals(key)) {
Log.d("gatsby", "preference");
}
return false;
}
@Override
public boolean onPreferenceTreeClick(PreferenceScreen preferenceScreen, Preference preference) {
// TODO Auto-generated method stub
final String key = preference.getKey();
if (KEY_PREFERENCE.equals(key)) {
Log.d("gatsby", "preference TreeClick!");
}
return super.onPreferenceTreeClick(preferenceScreen, preference);
}
}
}
二. ndroid7.1 删除Preference
2.1.删除PreferenceCategory
final PreferenceGroup debugNetworkingCategory = (PreferenceGroup)
findPreference(DEBUG_NETWORKING_CATEGORY_KEY);
debugNetworkingCategory.removePreference(mWifiDisplayCertification);//1
getPreferenceScreen().removePreference(debugNetworkingCategory);
三.ListPreference
<?xml version="1.0" encoding="utf-8"?>
四.Preferences OnPreferenceClickListener
4.0. Preference 布局
--- a/packages/apps/Settings/res/xml/privacy_settings.xml
+++ b/packages/apps/Settings/res/xml/privacy_settings.xml
@@ -64,5 +64,16 @@
android:fragment="com.android.settings.MasterClear" />
+
+
+
+
+
+
+
4.1.Android5.1 内部类 OnPreferenceClickListener preferenceClickListener = new OnPreferenceClickListener()
--- a/packages/apps/Settings/src/com/android/settings/PrivacySettings.java
+++ b/packages/apps/Settings/src/com/android/settings/PrivacySettings.java
@@ -32,11 +32,14 @@ import android.os.UserManager;
import android.preference.Preference;
import android.preference.PreferenceCategory;
import android.preference.Preference.OnPreferenceChangeListener;
+import android.preference.Preference.OnPreferenceClickListener;
import android.preference.PreferenceScreen;
import android.preference.SwitchPreference;
import android.provider.SearchIndexableResource;
import android.provider.Settings;
import android.util.Log;
+import java.io.DataInputStream;
+import java.io.DataOutputStream;
import com.android.settings.search.BaseSearchIndexProvider;
import com.android.settings.search.Indexable;
@@ -59,6 +62,7 @@ public class PrivacySettings extends SettingsPreferenceFragment implements
private static final String CONFIGURE_ACCOUNT = "configure_account";
private static final String BACKUP_INACTIVE = "backup_inactive";
private static final String PERSONAL_DATA_CATEGORY = "personal_data_category";
+ private static final String REBOOT_LOADER_KEY = "reboot_loader_key";
private static final String TAG = "PrivacySettings";
private IBackupManager mBackupManager;
private SwitchPreference mBackup;
@@ -66,6 +70,7 @@ public class PrivacySettings extends SettingsPreferenceFragment implements
private Dialog mConfirmDialog;
private PreferenceScreen mConfigure;
private boolean mEnabled;
+ private Preference mRebootloader;
private static final int DIALOG_ERASE_BACKUP = 2;
private int mDialogType;
@@ -91,6 +96,9 @@ public class PrivacySettings extends SettingsPreferenceFragment implements
mAutoRestore.setOnPreferenceChangeListener(preferenceChangeListener);
mConfigure = (PreferenceScreen) screen.findPreference(CONFIGURE_ACCOUNT);
+
+ mRebootloader = (Preference) findPreference(REBOOT_LOADER_KEY);
+ mRebootloader.setOnPreferenceClickListener(preferenceClickListener);
ArrayList keysToRemove = getNonVisibleKeys(getActivity());
final int screenPreferenceCount = screen.getPreferenceCount();
@@ -162,6 +170,48 @@ public class PrivacySettings extends SettingsPreferenceFragment implements
}
};
+ private OnPreferenceClickListener preferenceClickListener = new OnPreferenceClickListener() {
+ @Override
+ public boolean onPreferenceClick(Preference preference) {
+ if (preference == mRebootloader) {
+ RootCommand("reboot loader");
+ }
+ return false;
+ }
+ };
+
4.2. Android 7.1 实现接口 implements Preference.OnPreferenceClickListener
--- a/packages/apps/Settings/src/com/android/settings/PrivacySettings.java
+++ b/packages/apps/Settings/src/com/android/settings/PrivacySettings.java
@@ -33,6 +33,7 @@ import android.provider.Settings;
import android.support.v14.preference.SwitchPreference;
import android.support.v7.preference.Preference;
import android.support.v7.preference.Preference.OnPreferenceChangeListener;
+import android.preference.Preference.OnPreferenceClickListener;
import android.support.v7.preference.PreferenceScreen;
import android.util.Log;
@@ -48,11 +49,14 @@ import java.util.Collection;
import java.util.HashSet;
import java.util.List;
import java.util.Set;
+import java.io.DataInputStream;
+import java.io.DataOutputStream;
+import android.view.View.OnClickListener;
/**
* Gesture lock pattern settings.
*/
-public class PrivacySettings extends SettingsPreferenceFragment implements Indexable {
+public class PrivacySettings extends SettingsPreferenceFragment implements Preference.OnPreferenceClickListener,Indexable {
// Vendor specific
private static final String GSETTINGS_PROVIDER = "com.google.settings";
@@ -62,6 +66,7 @@ public class PrivacySettings extends SettingsPreferenceFragment implements Index
private static final String DATA_MANAGEMENT = "data_management";
private static final String BACKUP_INACTIVE = "backup_inactive";
private static final String FACTORY_RESET = "factory_reset";
+ private static final String REBOOT_LOADER_KEY = "reboot_loader_key";
private static final String TAG = "PrivacySettings";
private IBackupManager mBackupManager;
private PreferenceScreen mBackup;
@@ -69,6 +74,7 @@ public class PrivacySettings extends SettingsPreferenceFragment implements Index
private PreferenceScreen mConfigure;
private PreferenceScreen mManageData;
private boolean mEnabled;
+ private Preference mRebootloader;
@Override
protected int getMetricsCategory() {
@@ -97,6 +103,9 @@ public class PrivacySettings extends SettingsPreferenceFragment implements Index
mConfigure = (PreferenceScreen) screen.findPreference(CONFIGURE_ACCOUNT);
mManageData = (PreferenceScreen) screen.findPreference(DATA_MANAGEMENT);
+
+ mRebootloader = (Preference) findPreference(REBOOT_LOADER_KEY);
+ mRebootloader.setOnPreferenceClickListener(this);
Set keysToRemove = new HashSet<>();
getNonVisibleKeys(getActivity(), keysToRemove);
@@ -140,7 +149,46 @@ public class PrivacySettings extends SettingsPreferenceFragment implements Index
return result;
}
};
+
+ @Override
+ public boolean onPreferenceClick(Preference preference) {
+ if (preference == mRebootloader) {
+ RootCommand("reboot loader");
+ }
+ return false;
+ }