Zi 字媒體

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; */ } } }