Android 自定义preference组件

向右看齐 2022-08-24 06:06 402阅读 0赞

上篇博文代码实现了Android自带的preference组件，本文将通过实例讲解自定义preference组件。

主要通过以下几步来实现：

1.定义需要的layout布局res->layout->xml文件；

2.通过继承Preference类，来实现自定义preference组件类；

3.通过xml文件引用自定义preference组件，res->xml->xml文件；

下面通过实例来实现：

1.需求：本实例主要实现一个LinearLayout包含ImageView,Button,TextView,通过点击LinearLayout,ImageView,Button，TextView中显示相关的内容；

2.效果图：

![Center][]

3.xml文件

a,layout->custom\_preference\_activity.xml

<?xml version="1.0" encoding="utf-8"?>
 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
 android:layout_width="match_parent"
 android:layout_height="match_parent"
 android:orientation="horizontal"
 android:gravity="center"
 android:id="@+id/my_ll"
 >
 <ImageView
 android:id="@+id/my_iv"
 android:layout_width="wrap_content"
 android:layout_height="wrap_content"
 android:layout_weight="1"
 android:src="@drawable/ic_launcher" >
 </ImageView>
 
 <Button
 android:id="@+id/my_btn"
 android:layout_width="wrap_content"
 android:layout_height="wrap_content"
 android:layout_weight="1"
 android:text="自定义" >
 </Button>
 
 <TextView
 android:id="@+id/my_tv"
 android:layout_width="wrap_content"
 android:layout_height="wrap_content"
 android:layout_weight="1"
 android:text="自定义preference" >
 </TextView>
 
 </LinearLayout>

b.xml->custom\_preference.xml

<?xml version="1.0" encoding="utf-8"?>
 <PreferenceScreen xmlns:android="http://schemas.android.com/apk/res/android" >
 <PreferenceCategory android:title="自定义项">
 <com.example.customsettingdemo.MyPreference
 android:key="my_preference_key"
 >
 </com.example.customsettingdemo.MyPreference>
 </PreferenceCategory>
 
 </PreferenceScreen>

4.java类文件

a. 自定义Preference组件 MyPreference.java

package com.example.customsettingdemo;
 
 import android.content.Context;
 import android.preference.Preference;
 import android.util.AttributeSet;
 import android.view.LayoutInflater;
 import android.view.View;
 import android.view.View.OnClickListener;
 import android.view.ViewGroup;
 import android.widget.Button;
 import android.widget.ImageView;
 import android.widget.LinearLayout;
 import android.widget.TextView;
 
 public class MyPreference extends Preference{
 
 	private Context mContext;
 	private OnClickListener mOnClickListener;
 	
 	private LinearLayout myLl;
 	private ImageView myIv;
 	private Button myBtn;
 	private TextView myTv;
 
 	public MyPreference(Context context, AttributeSet attrs, int defStyle) {
 		super(context, attrs, defStyle);
 		this.mContext = context;
 		// TODO Auto-generated constructor stub
 	}
 
 	public MyPreference(Context context, AttributeSet attrs) {
 		this(context, attrs, 0);
 		// TODO Auto-generated constructor stub
 	}
 
 	public MyPreference(Context context) {
 		this(context, null, 0);
 		// TODO Auto-generated constructor stub
 	}
 	
 	public void setmOnClickListener(OnClickListener mOnClickListener){
 		this.mOnClickListener = mOnClickListener;
 	}
 
 	
 	@Override
 	public View onCreateView(ViewGroup parent){
 
 		LayoutInflater inflater =(LayoutInflater) mContext.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
 		View myView = inflater.inflate(R.layout.custom_preference_activity, null);
 		
 		return myView;
 	
 	}
 	
 	@Override
 	public void onBindView(View view){
 		myLl = (LinearLayout) view.findViewById(R.id.my_ll);
 		myIv = (ImageView) view.findViewById(R.id.my_iv);
 		myBtn = (Button) view.findViewById(R.id.my_btn);
 		myTv = (TextView) view.findViewById(R.id.my_tv);
 		
 		myLl.setOnClickListener(mOnClickListener);
 		myIv.setOnClickListener(mOnClickListener);
 		myBtn.setOnClickListener(mOnClickListener);
 	}
 
 	public LinearLayout getMyLl() {
 		return myLl;
 	}
 
 	public ImageView getMyIv() {
 		return myIv;
 	}
 
 
 	public Button getMyBtn() {
 		return myBtn;
 	}
 
 
 	public TextView getMyTv() {
 		return myTv;
 	}
 
 }

b. setting主界面CustomSettingDemo

package com.example.customsettingdemo;
 
 import android.os.Bundle;
 import android.preference.PreferenceActivity;
 import android.view.View;
 import android.view.View.OnClickListener;
 
 public class CustomSettingDemo extends PreferenceActivity implements OnClickListener{
 	
 	private MyPreference mMyPreference;
 	@SuppressWarnings("deprecation")
 	@Override
 	public void onCreate(Bundle savedInstanceState){
 		super.onCreate(savedInstanceState);
 		this.addPreferencesFromResource(R.xml.custom_preference);
 		
 		initPreference();
 	}
 	
 	@SuppressWarnings("deprecation")
 	private void initPreference(){
 		mMyPreference = (MyPreference)this.findPreference("my_preference_key");
 		mMyPreference.setmOnClickListener(this);
 	}
 
 	@Override
 	public void onClick(View v) {
 		// TODO Auto-generated method stub
 		switch(v.getId()){
 		case R.id.my_ll:
 			showInfo("this is LinearLayout");
 			break;
 		case R.id.my_iv:
 			showInfo("this is imageview");
 			break;
 		case R.id.my_btn:
 			showInfo("this is button");
 			break;
 		}
 	}
 	
 	private void showInfo(String info){
 		if(mMyPreference != null){
 			mMyPreference.getMyTv().setText(info);
 		}
 	}
 }

5.AndroidManifest.xml清单文件

<?xml version="1.0" encoding="utf-8"?>
 <manifest xmlns:android="http://schemas.android.com/apk/res/android"
 package="com.example.customsettingdemo"
 android:versionCode="1"
 android:versionName="1.0" >
 
 <uses-sdk
 android:minSdkVersion="8"
 android:targetSdkVersion="19" />
 
 <application
 android:allowBackup="true"
 android:icon="@drawable/ic_launcher"
 android:label="@string/app_name"
 android:theme="@style/AppTheme" >
 <activity
 android:name="com.example.customsettingdemo.CustomSettingDemo"
 android:label="@string/app_name" >
 <intent-filter>
 <action android:name="android.intent.action.MAIN" />
 
 <category android:name="android.intent.category.LAUNCHER" />
 </intent-filter>
 </activity>
 </application>
 
 </manifest>

至此，自定义Preference组件代码实现完成。

源代码下载：[http://download.csdn.net/detail/a123demi/7569163][http_download.csdn.net_detail_a123demi_7569163]

[Center]: /images/20220823/25501608e56343e8979b5987329f15b8.png
[http_download.csdn.net_detail_a123demi_7569163]: http://download.csdn.net/detail/a123demi/7569163