shiun-chih's 垃圾桶: Android中HTTP 檔案下載

Android中HTTP 檔案下載
利用java的httpclicent+HttpResponse+thread 讓程式可以執行下載(否則gui無法等待網路),利用Handler實做可以設定gui的timer,利用HttpResponse.getEntity().getContentLength();取得網路檔案大小,利用Toast.makeText顯示及時提示訊息，歡迎有興趣的同好一起來C/P。
package com.example.framelayout_http_download;
import com.example.framelayout_http_download.MainActivity.ButListener;

import android.os.Bundle;
import android.os.Environment;
import android.os.Handler;
import android.os.Message;
import android.preference.PreferenceManager;
import android.annotation.SuppressLint;
import android.app.Activity;
import android.app.DownloadManager;
import android.app.ProgressDialog;
import android.view.Menu;

///////////////////////////////
import java.io.File;
import java.io.FileOutputStream; 
import java.io.IOException;
import java.io.InputStream;
import java.util.Timer;
import java.util.TimerTask;

import org.apache.http.HttpResponse;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.impl.client.DefaultHttpClient;

///////////////////////////////////////
import android.view.View;
import android.util.AttributeSet;
import android.util.DisplayMetrics;
import android.util.Log;
import android.view.Gravity;
import android.view.Window;
import android.view.WindowManager;
import android.webkit.MimeTypeMap;
import android.webkit.WebView;
import android.widget.Button;
import android.widget.FrameLayout;
import android.widget.ImageView;
import android.widget.MediaController;
import android.widget.PopupWindow;
import android.widget.SeekBar;
import android.widget.TextView;
import android.widget.VideoView;
import android.view.*;
import android.view.View.*;
import android.widget.*;
import android.view.ViewGroup.MarginLayoutParams;  
import android.app.ActionBar.LayoutParams;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.content.SharedPreferences;
import android.database.Cursor;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.Color;
import android.graphics.drawable.BitmapDrawable;
import android.graphics.drawable.ShapeDrawable;
import android.graphics.drawable.shapes.OvalShape;
import android.app.DownloadManager;
import android.app.DownloadManager.Request;
import android.net.Uri;

public class MainActivity extends Activity {
	FrameLayout FrameLayout1;
	DisplayMetrics metrics;
	TextView TextView1;
	Button Button1;
	//WebView WebView1;
	String SDPATH;
	Thread thread;

	int check;
	int downloadselect;
	long filesize,downloadsize;
	Handler mHandlerTime;
	int FILESIZE = 4 * 1024;
	private DownloadManager downloadManager;
	private SharedPreferences prefs;
	private static final String DL_ID = "downloadId";	
	@Override
	protected void onCreate(Bundle savedInstanceState) {
	    super.onCreate(savedInstanceState);
	    /////////////////////////////////////////
	    requestWindowFeature(Window.FEATURE_NO_TITLE);   //全螢幕設定
	    getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN, 
	    WindowManager.LayoutParams.FLAG_FULLSCREEN);
	    metrics = new DisplayMetrics();//抓取螢幕大小
	    getWindowManager().getDefaultDisplay().getMetrics(metrics);
	    
	    /////////////////////////////////////////
	    FrameLayout1 = new FrameLayout(this);
	    FrameLayout.LayoutParams lparam1 = new FrameLayout.LayoutParams(metrics.widthPixels,metrics.heightPixels);
	    FrameLayout1.setLayoutParams(lparam1);
	    this.setContentView(FrameLayout1);
	    
	    ////////////////////////////////////////
	    Button1=new Button(this);
	    FrameLayout.LayoutParams layoutParams_Button = new FrameLayout.LayoutParams(metrics.widthPixels/4, metrics.heightPixels/4);
	    layoutParams_Button.gravity = Gravity.LEFT|Gravity.TOP;
	    layoutParams_Button.leftMargin = 0;//X
	    layoutParams_Button.topMargin = 0;//Y
	    Button1.setLayoutParams(layoutParams_Button);
	    Button1.setText("下載");
	    FrameLayout1.addView(Button1);
	    
	    TextView1=new TextView(this);
	    FrameLayout.LayoutParams layoutParams_TextView = new FrameLayout.LayoutParams(metrics.widthPixels/4, metrics.heightPixels/4);
	    layoutParams_TextView.gravity = Gravity.LEFT|Gravity.TOP;
	    layoutParams_TextView.leftMargin = 0;//X
	    layoutParams_TextView.topMargin = metrics.heightPixels/4;//Y
	    TextView1.setLayoutParams(layoutParams_TextView);
	    TextView1.setText("請點選 下載按鈕");
	    FrameLayout1.addView(TextView1);
	    /*
	    WebView1=new WebView(this);
	    FrameLayout.LayoutParams layoutParams_WebView = new FrameLayout.LayoutParams(metrics.widthPixels, metrics.heightPixels/4*3);
	    layoutParams_Button.gravity = Gravity.LEFT|Gravity.TOP;
	    layoutParams_Button.leftMargin = 0;//X
	    layoutParams_Button.topMargin = metrics.heightPixels/4;//Y
	    WebView1.setLayoutParams(layoutParams_WebView);
	    WebView1.loadUrl("http://www.google.com/");
	    FrameLayout1.addView(WebView1);
	    */
	    check=0;
	    filesize=0;
	    downloadsize=0;
	    downloadselect=0;
	    mHandlerTime = new Handler();
	    Button1.setOnClickListener(new ButListener());	 
		File df1 = new File("sdcard/DownLoad/PPTV.exe");
		File df2 = new File("sdcard/DownLoad/pptv.png");
		if (df1.exists())
		    df1.delete();
		if (df2.exists())
		    df2.delete();	
	}
	public Runnable mDownload = new Runnable() 
	{
		@Override
		public void run()
		{
			String REMOTE_FILE_URL=new String();
			if(downloadselect==0)
			{
				REMOTE_FILE_URL="http://apk.ottclub.info/exe/PPTV.exe";
				//downloadselect++;
			}
			else
			{
				REMOTE_FILE_URL="http://apk.ottclub.info/exe/icons/pptv.png";
				//downloadselect=0;
			}
			int BUFFER = 1024;
		    
			DefaultHttpClient httpClient = new DefaultHttpClient();
	        HttpGet httpGet = new HttpGet(REMOTE_FILE_URL);
	        
			try 
			{
				HttpResponse response = httpClient.execute(httpGet);
				InputStream in = response.getEntity().getContent();
			    filesize=response.getEntity().getContentLength();
				FileOutputStream out;
				if(downloadselect==0)
				{
					out = new FileOutputStream(new File("sdcard/DownLoad/PPTV.exe"));
					downloadselect++;
				}
				else
				{
					out = new FileOutputStream(new File("sdcard/DownLoad/pptv.png"));
					downloadselect=0;
				}
				byte[] b = new byte[BUFFER];
				int len = 0;
			    downloadsize=0;
				while((len=in.read(b))!= -1)
				{
					downloadsize+=len;
					out.write(b,0,len);
				}
				in.close();
				out.close();
			}
			catch(ClientProtocolException e)
			{
				e.printStackTrace();
			}
			catch (IOException e)
			{
				e.printStackTrace();
			}
			finally
			{
				//httpGet.releaseConnection();
				httpClient.getConnectionManager().shutdown();
				check=1;
			}

		}
	};
	@Override
	public boolean onCreateOptionsMenu(Menu menu) {
		// Inflate the menu; this adds items to the action bar if it is present.
		getMenuInflater().inflate(R.menu.main, menu);
		return true;
	}
	private final Runnable timerRun = new Runnable()
	  {
	    public void run()
	    {
	    	if( (thread!=null) && (check==0))
	    	{
	    		String StrPercent="目前下載百分比:"+String.valueOf( (((float)downloadsize/(float)filesize) *100))+"%";
				TextView1.setText("");
				TextView1.append("下載中請稍後....\n");
				TextView1.append(StrPercent);
	    		mHandlerTime.postDelayed(this, 1000);
	    	}
	    	if( (thread!=null) && (check==1))
	    	{
				TextView1.setText("");
				TextView1.append("下載完成\n");
				TextView1.append("請到指令目錄查看\n");
				thread.interrupt();
				thread=null;
				Button1.setEnabled(true);
	    	}	    	
	      // 若要取消可以寫一個判斷在這決定��否啟動下一次即可
	    }
	  };
	class ButListener implements OnClickListener
	{
		public void onClick(View v)
		{
			if(downloadselect==0)
			{
				Toast.makeText(MainActivity.this, "準備 利用執行緒下載檔案 PPTV.exe...", Toast.LENGTH_SHORT).show();
			}
			else
			{
				Toast.makeText(MainActivity.this, "準備 利用執行緒下載檔案 pptv.png...", Toast.LENGTH_SHORT).show();
			}
			Button1.setEnabled(false);
			thread =new Thread(mDownload);
			thread.start();
			mHandlerTime.postDelayed(timerRun, 1000);		
			/*
			while(check==0)
			{
				TextView1.setText("");
				TextView1.append("下載完成\n");
				TextView1.append("請到指令目錄查看\n");
				thread.interrupt();
				thread=null;
			}
			check=0;
			*/
		}
	}
}
shiun-chih's 垃圾桶

2014年1月9日星期四

Android中HTTP 檔案下載

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2014年1月9日 星期四

Android中HTTP 檔案下載

沒有留言:

張貼留言

2014年1月9日星期四
