自定义Preference

import android.content.Context; 
import android.content.Intent; 
import android.os.Bundle; 
import android.preference.Preference; 
import android.preference.PreferenceActivity; 
import android.util.AttributeSet; 
import android.view.View; 
import android.widget.ImageView; 

/** 
* 图片选项，用于设置图片和边框 
* @author Winter Lau 
*/ 
public class ImageOptionPreference extends Preference { 

private PreferenceActivity parent; 
private int mImage = R.drawable.car; 
private ImageView preview_img; 

public ImageOptionPreference(Context context, AttributeSet attrs, int defStyle) { 
super(context, attrs, defStyle); 
} 

public ImageOptionPreference(Context context, AttributeSet attrs) { 
super(context, attrs); 
} 

public ImageOptionPreference(Context context) { 
super(context); 
} 

void setActivity(PreferenceActivity parent) { 
this.parent = parent; 
} 

@Override 
public boolean isPersistent() { 
return false; 
} 

/** 
* 修改图片 
* @param newImage 
* @return 
*/ 
boolean ChangeGamePic(int newImage ){ 
if(this.mImage == newImage) 
return false; 
GameGlobal.save_pic(newImage); 
this.mImage = newImage; 
preview_img.setImageResource(newImage); 
return true; 
} 

@Override 
protected void onBindView(View view) { 
super.onBindView(view); 

this.mImage = GameGlobal.get_pic(); 
preview_img = (ImageView)view.findViewById(R.id.pref_current_img); 
preview_img.setImageResource(this.mImage); 
}	

    @Override 
    protected void onClick() { 
        super.onClick(); 
        Bundle bundle = new Bundle(); 
        bundle.putInt(GameGlobal.PREF_KEY_IMAGE, this.mImage); 
        Intent intent = new Intent(parent, ImageSelector.class); 
        intent.putExtras(bundle); 
        parent.startActivityForResult(intent, MagicSetting.REQUEST_CODE_GAME_IMAGE);        
    } 

} 

对应的 Perference 配置信息如下

<com.liusoft.android.fmagic.ImageOptionPreference       
        android:key="game_pic" 
        android:persistent="false" 
        android:title="@string/pref_pic_title" 
        android:summary="@string/pref_pic_summary" 
        android:widgetLayout="@layout/preference_widget_image" 
    /> 

而 preference_widget_image 的信息如下

<?xml version="1.0" encoding="utf-8"?> 

<!-- Layout used by ImageOptionPreference for the image option style. 
     This is inflated inside android.R.layout.preference. 
     --> 
<ImageView xmlns:android="http://schemas.android.com/apk/res/android" 
    android:id="@+id/pref_current_img" 
    android:layout_width="54dip" 
    android:layout_height="54dip" 
    android:layout_marginRight="4dip" 
    android:layout_gravity="center_vertical" 
    android:focusable="false" 
    android:clickable="false" 
    android:background="#eeeeee" 
    android:padding="2dip" 
    /> 

而这个 ImageView 的 Layout 就是在选项右边显示的图片。

评论

1 楼 lyltiger 2011-10-12  

这个有点错误啊~~