来源: 互联网  发布时间: 2014-02-18

Looper物件之角色(Demo 3)
这个例子是为了更进一步的理解Demo2
这个例子跟Demo2只是有些小的改动,大家可以对比的看下
Java代码 
 
package com.example.Looper_03;  
 
import android.app.Activity;  
import android.content.Context;  
import android.graphics.Color;  
import android.os.Bundle;  
import android.os.Handler;  
import android.os.Looper;  
import android.os.Message;  
import android.view.View;  
import android.view.View.OnClickListener;  
import android.widget.Button;  
import android.widget.LinearLayout;  
import android.widget.TextView;  
 
public class Looper_03 extends Activity implements OnClickListener {  
    private final int WC = LinearLayout.LayoutParams.WRAP_CONTENT;  
    private final int FP = LinearLayout.LayoutParams.FILL_PARENT;  
    public TextView tv;  
    private myThread t;  
    private Button btn, btn2;  
    EventHandler h;  
    Context ctx;  
 
    public void onCreate(Bundle icicle) {  
        super.onCreate(icicle);  
        ctx = this;  
        LinearLayout layout = new LinearLayout(this);  
        layout.setOrientation(LinearLayout.VERTICAL);  
        btn = new Button(this);  
        btn.setId(101);  
        btn.setBackgroundResource(R.drawable.icon);  
        btn.setText("test looper");  
        btn.setOnClickListener(this);  
        LinearLayout.LayoutParams param = new LinearLayout.LayoutParams(100, 50);  
        param.topMargin = 10;  
        layout.addView(btn, param);  
        btn2 = new Button(this);  
        btn2.setId(102);  
        btn2.setBackgroundResource(R.drawable.icon);  
        btn2.setText("exit");  
        btn2.setOnClickListener(this);  
        layout.addView(btn2, param);  
        tv = new TextView(this);  
        tv.setTextColor(Color.WHITE);  
        tv.setText("");  
        LinearLayout.LayoutParams param2 = new LinearLayout.LayoutParams(FP, WC);  
        param2.topMargin = 10;  
        layout.addView(tv, param2);  
        setContentView(layout);  
    }  
 
    public void onClick(View v) {  
        switch (v.getId()) {  
        case 101:  
            // 此h是屬於main線程的(用來存取主線程的MessageQueue)  
            //h = new EventHandler(Looper.myLooper());//@  
              
            //或者可以写成这样;  
            h = new EventHandler();  
              
            t = new myThread();  
            t.start();  
            break;  
        case 102:  
            finish();  
            break;  
        }  
    }  
      
    //或者可以写成这样;  
    public class EventHandler extends Handler {  
        @Override 
        public void handleMessage(Message msg) {  
            ((Activity) ctx).setTitle((String) msg.obj);  
        }  
    }  
 
    // ------------------------------------------------  
    /*public class EventHandler extends Handler {//@ 
        public EventHandler(Looper looper) { 
            super(looper); 
        } 

        @Override 
        public void handleMessage(Message msg) { 
            ((Activity) ctx).setTitle((String) msg.obj); 
        } 
    }*/ 
 
    // ------------------------------------------------------  
    class myThread extends Thread {  
        public void run() {  
            String obj = "from myThread";  
            Message m = h.obtainMessage(1, 1, 1, obj);  
            //这里还是通过主线程的handler来传送消息  
            //所以还是由主线程的Looper来接受消息  
            h.sendMessage(m);  
        }  
    }  
}  
// ------------------------------------------------------ 

    

    来源: 互联网  发布时间: 2014-02-18

直接说过程吧:
直接说过程吧:
1.构建一个HashMap:
Java代码 
ArrayList<HashMap<String, String>> dlist = new ArrayList<HashMap<String, String>>();  
 
        for (int i = 0; i < data.length; i++) {  
            HashMap<String, String> map = new HashMap<String, String>();  
            map.put("data", data[i]);  
            dlist.add(map);  
        } 

ArrayList<HashMap<String, String>> dlist = new ArrayList<HashMap<String, String>>();

for (int i = 0; i < data.length; i++) {
HashMap<String, String> map = new HashMap<String, String>();
map.put("data", data[i]);
dlist.add(map);
}


2.设置SimpleAdapter:
Java代码 
SimpleAdapter adapter = new SimpleAdapter(this, dlist,  
                R.layout.list_item, new String[] { "data" },  
                new int[] { R.id.entries });  
 
        list.setAdapter(adapter); 

SimpleAdapter adapter = new SimpleAdapter(this, dlist,
R.layout.list_item, new String[] { "data" },
new int[] { R.id.entries });

list.setAdapter(adapter);


3.主要在list_item上:
Java代码 
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" 
    android:layout_width="fill_parent" android:layout_height="fill_parent" 
    android:background="@drawable/selector">  
    <TextView android:text="data" android:id="@+id/entries" 
        android:layout_width="match_parent" android:layout_height="wrap_content">  
    </TextView>  
</LinearLayout> 

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent" android:layout_height="fill_parent"
android:background="@drawable/selector">
<TextView android:text="data" android:id="@+id/entries"
android:layout_width="match_parent" android:layout_height="wrap_content">
</TextView>
</LinearLayout>


4.上述item上设置了背景:selector.xml:
Java代码 
<item android:state_selected="true">  
        <shape>  
            <gradient android:angle="270" android:endColor="#ffffffff" 
                android:startColor="#ffffffff" />  
            <padding android:left="15dp" android:top="20dp" 
                android:right="15dp" android:bottom="20dp" />  
 
            <size android:height="60dp" android:width="320dp" />  
 
            <corners android:radius="8dp" />  
 
        </shape>  
    </item> 

<item android:state_selected="true">
<shape>
<gradient android:angle="270" android:endColor="#ffffffff"
android:startColor="#ffffffff" />
<padding android:left="15dp" android:top="20dp"
android:right="15dp" android:bottom="20dp" />

<size android:height="60dp" android:width="320dp" />

<corners android:radius="8dp" />

</shape>
</item>







"android:state_selected="true""这个属性还有:"android:state_pressed="true""或者不设置表示默认的时候背景情况.

我写在这里是为了后续编码的时候参考的......:)

    

    来源: 互联网  发布时间: 2014-02-18

应用获取手机本地图片资源
private Button mGetImg;  
 
    /** Called when the activity is first created. */ 
    @Override 
    public void onCreate(Bundle savedInstanceState) {  
        super.onCreate(savedInstanceState);  
        setContentView(R.layout.main);  
        findView();  
    }  
 
    public void findView() {  
        mGetImg = (Button) findViewById(R.id.mGetLocalImg);  
        mGetImg.setOnClickListener(this);  
    }  
 
    public void onClick(View v) {  
        Intent intent = new Intent();  
        intent.setType("image/*");  
        // intent.setType("video/*");  
        intent.setAction(Intent.ACTION_GET_CONTENT);  
        startActivityForResult(intent, 1);  
    }  
 
    protected void onActivityResult(int requestCode, int resultCode, Intent data) {  
        if (resultCode == RESULT_OK) {  
            switch (requestCode) {  
            case 1:  
                Uri uri = data.getData();  
                ContentResolver cr = getContentResolver();  
                Cursor mCur = cr.query(uri, null, null, null, null);  
                /** 得到本地图片库中图片的 id、路径、大小、文件名 */  
                // cursor.getString(0),1,2,3  
                if(!mCur.moveToFirst()){  
                    return;  
                }  
                try {  
                    String mImgPath = mCur.getString(mCur.getColumnIndex("_data"));  
                    System.out.println("mImgPath__________" + mImgPath);  
                    // InputStream in = cr.openInputStream(uri);  
                    // Bitmap mBitmap = BitmapFactory.decodeStream(in);  
                } catch (Exception e) {  
                    e.printStackTrace();  
                }  
                break;  
            }  
        }  
    }