ob_clean();//加上这行
		header('Pragma: public');
		header('Expires: 0');
		header('Cache-Control: must-revalidate, post-check=0, pre-check=0');
		header('Content-Transfer-Encoding: binary');
		header("Content-type: image/png");
		imagepng($image);
		imagedestroy($image);

package cc.ewings.download;

import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.URL;

public class HttpDownloader {
	private URL url=null;

	//本函数近适用于文本类文件的下载
	public String download(String urlStr){
		StringBuffer sb=new StringBuffer();
		String line=null;
		BufferedReader buffer = null;
		try{
			//URL->HttpURLConnection->InputStream->InputStreamReader->BufferReader.readLine()
			url=new URL(urlStr);
			HttpURLConnection urlConn=(HttpURLConnection) url.openConnection();
			buffer = new BufferedReader(new InputStreamReader(urlConn.getInputStream()));
			while((line=buffer.readLine()) != null){
				sb.append(line);
			}
		} catch (Exception e){
			e.printStackTrace();
		} finally {
			try{
				buffer.close();
			} catch(Exception e){
				e.printStackTrace();
			}
		}

		return sb.toString();

	}
}

1 创建一个继承自BroadReceiver的类MyReceiver：

package cc.ewings.BroadcastTest;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
public class MyReceiver extends BroadcastReceiver {

	@Override
	public void onReceive(Context arg0, Intent arg1) {
		// TODO Auto-generated method stub
		System.out.println("received");
	}
}

2 在主类中广播intent

package cc.ewings.BroadcastTest;

import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;

public class BroadCastActivity extends Activity {
    Button myBtn;
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);

        myBtn=(Button) this.findViewById(R.id.myBtn);
        myBtn.setOnClickListener(new MyListener());
    }

    class MyListener implements OnClickListener{

		public void onClick(View arg0) {
			// TODO Auto-generated method stub
			Intent myIntent=new Intent();
			myIntent.setAction(Intent.ACTION_EDIT);
			BroadCastActivity.this.sendBroadcast(myIntent);
		}

    }
}

3 在Manifest中注册receiver

<receiver android:name=".MyReceiver">
        <intent-filter>
            <action android:name="android.intent.action.EDIT"/>
        </intent-filter>
    </receiver>

注： 在主Activity中也可以直接注册侦听，这样就不用再Manifest注册了：

package cc.ewings.BroadcastTest;

import android.app.Activity;
import android.content.Intent;
import android.content.IntentFilter;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;

public class BroadCastCodeDefine extends Activity {
    Button myBtn;
    MyReceiver receiver;
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);

        myBtn=(Button) this.findViewById(R.id.myBtn);
        myBtn.setOnClickListener(new MyListener());
        receiver=new MyReceiver();
        registerReceiver(receiver, new IntentFilter("cc.ewings.foodstar.refreshPage"));
    }

    @Override
    protected void onPause() {
        super.onPause();
         unregisterReceiver(receiver);
    }

    class MyListener implements OnClickListener{

		public void onClick(View arg0) {
			// TODO Auto-generated method stub
			System.out.println("broadcasting");
			Intent myIntent=new Intent();
			myIntent.setAction("cc.ewings.foodstar.refreshPage");
			BroadCastCodeDefine.this.sendBroadcast(myIntent);
		}

    }
}

这样的好处是，可以关闭侦听。用Manifest中注册的，则关闭程序后仍然能收到侦听。

cmd->adb shell
cd data/data/包名/databases
ls
sqllite3 数据库名
select * form 表名;

二  Android代码

1 新建DBHelper类

package cc.ewings.lib;

import android.content.Context;
import android.database.sqlite.SQLiteDatabase;
import android.database.sqlite.SQLiteDatabase.CursorFactory;
import android.database.sqlite.SQLiteOpenHelper;

public class DBHelper extends SQLiteOpenHelper {

	public DBHelper(Context context, String name, CursorFactory factory,
			int version) {
		super(context, name, factory, version);
		// TODO Auto-generated constructor stub
	}

	@Override
	public void onCreate(SQLiteDatabase db) {
		System.out.println("Create Database");
		db.execSQL("create table user(id int, name varchar(20))");
	}

	@Override
	public void onUpgrade(SQLiteDatabase arg0, int arg1, int arg2) {
		System.out.println("Update Database");
	}
}

2 主Activity

package cc.ewings.sqllite;

import cc.ewings.lib.DBHelper;
import android.app.Activity;
import android.content.ContentValues;
import android.database.Cursor;
import android.database.sqlite.SQLiteDatabase;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;

public class SQLiteTestActivity extends Activity {
	DBHelper dbHelper=new DBHelper(SQLiteTestActivity.this,"testDB",null,1);
	SQLiteDatabase db;
	int i=1;
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        Button createBtn=(Button) this.findViewById(R.id.createBtn);
        Button addBtn=(Button) this.findViewById(R.id.addBtn);
        Button updateBtn=(Button) this.findViewById(R.id.updateBtn);
        Button selectBtn=(Button) this.findViewById(R.id.selectBtn);
        Button deleteBtn=(Button) this.findViewById(R.id.deleteBtn);

        createBtn.setOnClickListener(new CreateListener());
        addBtn.setOnClickListener(new AddListener());
        updateBtn.setOnClickListener(new UpdateListener());
        selectBtn.setOnClickListener(new SelectListener());
        deleteBtn.setOnClickListener(new DeleteListener());
    }

    class CreateListener implements OnClickListener{

		public void onClick(View arg0) {
			System.out.println("Create Database");
	        db= dbHelper.getWritableDatabase();
		}
    }

    class AddListener implements OnClickListener{
		public void onClick(View arg0) {
			System.out.println("Add Data");
			ContentValues value=new ContentValues();
			value.put("id", i++);
			value.put("name", "zhangshan");
			db=dbHelper.getWritableDatabase();
			db.insert("user", null, value);
		}
    }

    class UpdateListener implements OnClickListener{ 

		public void onClick(View arg0) {
			System.out.println("Insert Data");
			ContentValues value=new ContentValues();
			value.put("name", "lisi");
			db=dbHelper.getWritableDatabase();
			db.update("user", value, "id=?",new String[]{"1"});
		}
    }

    class SelectListener implements OnClickListener{ 

		public void onClick(View arg0) {
			System.out.println("Select Data");
			db=dbHelper.getReadableDatabase();
			Cursor cursor=db.query("user", new String[]{"id","name"}, null, null, null, null, null);
			while(cursor.moveToNext()){
				int id=cursor.getInt(cursor.getColumnIndex("id"));
				String name=cursor.getString(cursor.getColumnIndex("name"));
				System.out.println("id="+id+"  name="+name);
			}
		}
    }

    class DeleteListener implements OnClickListener{ 

		public void onClick(View arg0) {
			System.out.println("Delete Data");
			db=dbHelper.getWritableDatabase();
			db.delete("user", "id=?", new String[]{"1"});
		}
    }
}

3 布局文件

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:orientation="vertical" >

    <Button 
        android:id="@+id/createBtn"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:text="Create Table"
        />
    <Button 
        android:id="@+id/addBtn"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:text="Add Data"
        />
    <Button 
        android:id="@+id/updateBtn"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:text="Update Data"
        />
    <Button 
        android:id="@+id/selectBtn"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:text="Select Data"
        />
    <Button
        android:id="@+id/deleteBtn"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:text="Delete Data"
        />

</LinearLayout>

1 Handler myHandler=new Handler {handleMessage(){}}定义内部匿名handler
注：super.handleMessage(msg);//注意：不能带着一句，否则报错

2 Runnable myRunnable=new Runnable(){run(){}}实现线程

3 myHandler.post(myRunnable) 开始线程，myHandler.removeCallbacks(myRunnable);终止线程

4 myHandler.postDelayed(1000) 线程推迟执行

5 Thread.sleep(1000) 在run()里暂停线程

6 在Run里传递参数给handler，hanler里的handleMessage会接收到消息，也可以在其中再次开始线程。
Message msg=myHandler.obtainMessage();
msg.arg1=progress;
myHandler.sendMessage(msg);

真线程

用HandlerThread.getLooper()给继承自Handler的MyHandler，这样就可以开始一个新的线程了。MyHandler要起到两个作用：1 把looper传给父级；2 重写handleMessage来加上自己的逻辑

package cc.ewings.handlerTest;

import android.app.Activity;
import android.os.Bundle;
import android.os.Handler;
import android.os.HandlerThread;
import android.os.Looper;
import android.os.Message;
import android.widget.Toast;

public class LooperAndBoundle extends Activity {

	@Override
	protected void onCreate(Bundle savedInstanceState) {
		// TODO Auto-generated method stub
		super.onCreate(savedInstanceState);
		setContentView(R.layout.main);

		HandlerThread handlerThread=new HandlerThread("my thread");
		handlerThread.start();
		MyHandler myHandler=new MyHandler(handlerThread.getLooper());
		Message msg=myHandler.obtainMessage();
		Bundle b=new Bundle();
		b.putString("name", "zhangsan");
		b.putInt("age", 30);
		msg.setData(b);
		msg.sendToTarget();
	}	

	class MyHandler extends Handler{
		public MyHandler(Looper looper){
			super(looper);
		}
		@Override
		public void handleMessage(Message msg) {
			// TODO Auto-generated method stub
			//super.handleMessage(msg);
			Bundle data=msg.getData();
			String name=(String) data.getString("name");
			int age=(int) data.getInt("age");
			Toast.makeText(LooperAndBoundle.this, "name: "+name+" age:"+age, Toast.LENGTH_LONG).show();
		}

	};
}

android:shrinkColumns和android:stretchColumns的值都是以0开始的index，但必须是string值，即用”1,2,5″来表示。可以用”*”来表示all columns。而且同一column可以同时设置为shrinkable和stretchable。

判断这些column是否shrinkable或stretchable，可以调用isColumnShrinkable/isColumnStretchable(int columnIndex)，isShrinkAllColumns()/isStretchAllColumns()。

而动态隐藏column，可以调用TableLayout.setColumnCollapsed (int columnIndex, boolean isCollapsed)来指定相应的column。另外TableLayout类的boolean isColumnCollapsed (int columnIndex)能够判断指定的column是否隐藏。

详细介绍和实例请见这里：

http://android.blog.51cto.com/268543/314262

测了下，IE9下没问题，其他浏览器没测。

后来发现是因为jdk安装在了c盘，系统有保护，不让生成文件。于是把jdk挪到D盘，再用命令： keytool -genkey -alias android.keystore -keyalg RSA -validity 100000 -keystore android.keystore

一步一步按提示来，果然成功生成了keystore文件。Oh yeah!