偶看新闻疤痕磨削术价格:远程下载安装apk文件到手机或模拟器
来源：百度文库 编辑：偶看新闻 时间：2024/04/27 14:48:32
Java代码
package cn.com;
import android.app.Activity;
import android.content.Intent;
import android.net.Uri;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.webkit.URLUtil;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;
/*必须引用java.io与java.net*/
import java.io.File;
import java.io.FileOutputStream;
import java.io.InputStream;
import java.net.URL;
import java.net.URLConnection;
public class InstallUrlApk extends Activity
{
private TextView mTextView01;
private EditText mEditText01;
//点击下载的按钮
private Button mButton01;
private static final String TAG = "DOWNLOADAPK";
private String currentFilePath = "";
private String currentTempFilePath = "";
private String strURL = "";
private String fileEx = "";
private String fileNa = "";
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
mTextView01 = (TextView) findViewById(R.id.myTextView1);
mButton01 = (Button) findViewById(R.id.myButton1);
mEditText01 = (EditText) findViewById(R.id.myEditText1);
mButton01.setOnClickListener(new Button.OnClickListener()
{
public void onClick(View v)
{
/* 文件会下载至local端 */
mTextView01.setText("下载中...");
strURL = mEditText01.getText().toString();
/取得欲安装程序之文件名称(后缀名)
fileEx = strURL.substring(strURL.lastIndexOf(".") + 1, strURL.length())
.toLowerCase();
System.out.println("***************fileEx =" + fileEx);
fileNa = strURL.substring(strURL.lastIndexOf("/") + 1, strURL
.lastIndexOf("."));
System.out.println("***************fileNa =" + fileNa);
//开启一个子线程进行文件的下载
getFile(strURL);
}
});
mEditText01.setOnClickListener(new EditText.OnClickListener()
{
@Override
public void onClick(View arg0)
{
// TODO Auto-generated method stub
mEditText01.setText("");
mTextView01.setText("远程安装程序(请输入URL)");
}
});
}
/* 处理下载URL文件自定义函数 */
private void getFile(final String strPath)
{
try
{
if (strPath.equals(currentFilePath))
{
getDataSource(strPath);
}
currentFilePath = strPath;
Runnable r = new Runnable()
{
public void run()
{
try
{
// 开启一个线程进行远程文件下载
getDataSource(strPath);
} catch (Exception e)
{
Log.e(TAG, e.getMessage(), e);
}
}
};
new Thread(r).start();
} catch (Exception e)
{
e.printStackTrace();
}
}
/* 取得远程文件 */
private void getDataSource(String strPath) throws Exception
{
//如果是一个正确的网址,就返回true
if (!URLUtil.isNetworkUrl(strPath))
{
mTextView01.setText("错误的URL");
} else
{
/* 取得URL */
URL myURL = new URL(strPath);
/* 创建连接 */
URLConnection conn = myURL.openConnection();
conn.connect();
/* InputStream 下载文件 */
InputStream is = conn.getInputStream();
if (is == null)
{
throw new RuntimeException("stream is null");
}
// 创建临时文件
// 两个参数分别为前缀和后缀
File myTempFile = File.createTempFile(fileNa, "." + fileEx);
/* 取得站存盘案路径 */
currentTempFilePath = myTempFile.getAbsolutePath();
/* 将文件写入暂存盘 */
FileOutputStream fos = new FileOutputStream(myTempFile);
byte buf[] = new byte[128];
do
{
int numread = is.read(buf);
if (numread <= 0)
{
break;
}
fos.write(buf, 0, numread);
} while (true);
// 打开文件进行安装(下载完成后执行的操作)
openFile(myTempFile);
try
{
is.close();
} catch (Exception ex)
{
Log.e(TAG, "error: " + ex.getMessage(), ex);
}
}
}
// 在手机上打开文件的method
private void openFile(File f)
{
Intent intent = new Intent();
intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
intent.setAction(android.content.Intent.ACTION_VIEW);
/* 调用getMIMEType()来取得MimeType */
String type = getMIMEType(f);
/* 设置intent的file与MimeType */
intent.setDataAndType(Uri.fromFile(f), type);
startActivity(intent);
}
/* 判断文件MimeType的method */
private String getMIMEType(File f)
{
String type = "";
String fName = f.getName();
/* 取得扩展名 */
String end = fName.substring(fName.lastIndexOf(".") + 1, fName.length())
.toLowerCase();
/* 依扩展名的类型决定MimeType */
if (end.equals("m4a") || end.equals("mp3") || end.equals("mid")
|| end.equals("xmf") || end.equals("ogg") || end.equals("wav"))
{
type = "audio";
} else if (end.equals("3gp") || end.equals("mp4"))
{
type = "video";
} else if (end.equals("jpg") || end.equals("gif") || end.equals("png")
|| end.equals("jpeg") || end.equals("bmp"))
{
type = "image";
} else if (end.equals("apk"))
{
/* android.permission.INSTALL_PACKAGES */
type = "application/vnd.android.package-archive";
} else
{
type = "*";
}
/* 如果无法直接打开，就跳出软件列表给用户选择 */
if (end.equals("apk"))
{
} else
{
type += "/*";
}
return type;
}
/* 自定义删除文件方法 */
private void delFile(String strFileName)
{
File myFile = new File(strFileName);
if (myFile.exists())
{
myFile.delete();
}
}
/* 当Activity处于onPause状态时,更改TextView文字状态 */
@Override
protected void onPause()
{
mTextView01 = (TextView) findViewById(R.id.myTextView1);
mTextView01.setText("下载成功");
super.onPause();
}
/* 当Activity处于onResume状态时,删除临时文件 */
@Override
protected void onResume()
{
// TODO Auto-generated method stub
/* 删除临时文件 */
delFile(currentTempFilePath);
super.onResume();
}
}
package cn.com;import android.app.Activity;import android.content.Intent;import android.net.Uri;import android.os.Bundle;import android.util.Log;import android.view.View;import android.webkit.URLUtil;import android.widget.Button;import android.widget.EditText;import android.widget.TextView; /*必须引用java.io与java.net*/import java.io.File;import java.io.FileOutputStream;import java.io.InputStream;import java.net.URL;import java.net.URLConnection;public class InstallUrlApk extends Activity{ private TextView mTextView01; private EditText mEditText01;//点击下载的按钮 private Button mButton01; private static final String TAG = "DOWNLOADAPK"; private String currentFilePath = ""; private String currentTempFilePath = ""; private String strURL = ""; private String fileEx = ""; private String fileNa = ""; /** Called when the activity is first created. */ @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); mTextView01 = (TextView) findViewById(R.id.myTextView1); mButton01 = (Button) findViewById(R.id.myButton1); mEditText01 = (EditText) findViewById(R.id.myEditText1); mButton01.setOnClickListener(new Button.OnClickListener() { public void onClick(View v) { /* 文件会下载至local端 */ mTextView01.setText("下载中..."); strURL = mEditText01.getText().toString(); /取得欲安装程序之文件名称(后缀名) fileEx = strURL.substring(strURL.lastIndexOf(".") + 1, strURL.length()) .toLowerCase(); System.out.println("***************fileEx =" + fileEx); fileNa = strURL.substring(strURL.lastIndexOf("/") + 1, strURL .lastIndexOf(".")); System.out.println("***************fileNa =" + fileNa); //开启一个子线程进行文件的下载 getFile(strURL); } }); mEditText01.setOnClickListener(new EditText.OnClickListener() { @Override public void onClick(View arg0) { // TODO Auto-generated method stub mEditText01.setText(""); mTextView01.setText("远程安装程序(请输入URL)"); } }); } /* 处理下载URL文件自定义函数 */ private void getFile(final String strPath) { try { if (strPath.equals(currentFilePath)) { getDataSource(strPath); } currentFilePath = strPath; Runnable r = new Runnable() { public void run() { try { // 开启一个线程进行远程文件下载 getDataSource(strPath); } catch (Exception e) { Log.e(TAG, e.getMessage(), e); } } }; new Thread(r).start(); } catch (Exception e) { e.printStackTrace(); } } /* 取得远程文件 */ private void getDataSource(String strPath) throws Exception {//如果是一个正确的网址,就返回true if (!URLUtil.isNetworkUrl(strPath)) { mTextView01.setText("错误的URL"); } else { /* 取得URL */ URL myURL = new URL(strPath); /* 创建连接 */ URLConnection conn = myURL.openConnection(); conn.connect(); /* InputStream 下载文件 */ InputStream is = conn.getInputStream(); if (is == null) { throw new RuntimeException("stream is null"); } // 创建临时文件 // 两个参数分别为前缀和后缀 File myTempFile = File.createTempFile(fileNa, "." + fileEx); /* 取得站存盘案路径 */ currentTempFilePath = myTempFile.getAbsolutePath(); /* 将文件写入暂存盘 */ FileOutputStream fos = new FileOutputStream(myTempFile); byte buf[] = new byte[128]; do { int numread = is.read(buf); if (numread <= 0) { break; } fos.write(buf, 0, numread); } while (true); // 打开文件进行安装(下载完成后执行的操作) openFile(myTempFile); try { is.close(); } catch (Exception ex) { Log.e(TAG, "error: " + ex.getMessage(), ex); } } } // 在手机上打开文件的method private void openFile(File f) { Intent intent = new Intent(); intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK); intent.setAction(android.content.Intent.ACTION_VIEW); /* 调用getMIMEType()来取得MimeType */ String type = getMIMEType(f); /* 设置intent的file与MimeType */ intent.setDataAndType(Uri.fromFile(f), type); startActivity(intent); } /* 判断文件MimeType的method */ private String getMIMEType(File f) { String type = ""; String fName = f.getName(); /* 取得扩展名 */ String end = fName.substring(fName.lastIndexOf(".") + 1, fName.length()) .toLowerCase(); /* 依扩展名的类型决定MimeType */ if (end.equals("m4a") || end.equals("mp3") || end.equals("mid") || end.equals("xmf") || end.equals("ogg") || end.equals("wav")) { type = "audio"; } else if (end.equals("3gp") || end.equals("mp4")) { type = "video"; } else if (end.equals("jpg") || end.equals("gif") || end.equals("png") || end.equals("jpeg") || end.equals("bmp")) { type = "image"; } else if (end.equals("apk")) { /* android.permission.INSTALL_PACKAGES */ type = "application/vnd.android.package-archive"; } else { type = "*"; } /* 如果无法直接打开，就跳出软件列表给用户选择 */ if (end.equals("apk")) { } else { type += "/*"; } return type; } /* 自定义删除文件方法 */ private void delFile(String strFileName) { File myFile = new File(strFileName); if (myFile.exists()) { myFile.delete(); } } /* 当Activity处于onPause状态时,更改TextView文字状态 */ @Override protected void onPause() { mTextView01 = (TextView) findViewById(R.id.myTextView1); mTextView01.setText("下载成功"); super.onPause(); } /* 当Activity处于onResume状态时,删除临时文件 */ @Override protected void onResume() { // TODO Auto-generated method stub /* 删除临时文件 */ delFile(currentTempFilePath); super.onResume(); }}另外例子中还可以通过
Java代码
- System.out.println("conn.getContentLength() =" + conn.getContentLength());
System.out.println("conn.getContentLength() =" + conn.getContentLength());获取下载文件的大小,然后来实现PrgressBar的下载进度显示