android如何安装apk默默的？

Question

我正在试图制作一个安装apk的应用程序。 但是，当我尝试，它总是给出错误。 我真的不明白我现在应该做什么。 我想我已经尝试了在网上发布的所有方式。任何人都可以帮助我知道我应该尝试的其他事情吗？

package com.example.filetest; 

import java.io.File; 
import java.io.IOException; 
import java.util.List; 

import android.app.Activity; 
import android.content.Intent; 
import android.content.pm.ApplicationInfo; 
import android.content.pm.PackageManager; 
import android.net.Uri; 
import android.os.Bundle; 
import android.os.Environment; 
import android.util.Log; 
import android.view.Menu; 
import android.view.MenuItem; 
import android.view.ViewDebug.FlagToString; 
import android.widget.Toast; 

public class MainActivity extends Activity { 

    int count = 0; 
    @Override 
    protected void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.activity_main); 


     /* File file = new File("/storage/external_storage/sda1","Scratch-v0.953.apk"); 
     Intent intent = new Intent(Intent.ACTION_VIEW);  intent.setDataAndType(Uri.fromFile(file), 
    "application/vnd.android.package-archive"); 
    intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK); 
    startActivity(intent); 
    */ 
    File file = new File("/storage/external_storage/sda1/FingerPCSettings"); 
    //File file = new File(Environment.getExternalStorageDirectory().getAbsolutePath()); 
    Log.i("TAG","exists = "+file.exists()); 
    File[] temp = file.listFiles(); 
    if(temp==null){ 
     Log.e("TAG","temp is null"); 
     return; 
    } 
     InstallAPK(temp[0]); 




} 

public static void InstallAPK(File file){ 
    Log.i("TAG", "install called "+file); 

    if(file.exists()){ 
     try { 
      String command; 
      command = "/system/bin/pm install -r " + file.getAbsolutePath(); 
      Log.i("TAG", "command="+command); 
      command = command.substring(0, 1); 
      Process proc = Runtime.getRuntime().exec(new String[] { command }); 
      proc.waitFor(); 

     } catch (Exception e) { 
      e.printStackTrace(); 
     } 
    } 
    } 

@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; 
} 

@Override 
protected void onResume() { 
    super.onResume(); 
    Log.i("TAG", "###########RESUME CALLEd"); 
} 

@Override 
public boolean onOptionsItemSelected(MenuItem item) { 
    // Handle action bar item clicks here. The action bar will 
    // automatically handle clicks on the Home/Up button, so long 
    // as you specify a parent activity in AndroidManifest.xml. 
    int id = item.getItemId(); 
    if (id == R.id.action_settings) { 
     return true; 
    } 
    return super.onOptionsItemSelected(item); 
} 
} 

当我尝试此代码时，我得到如下错误。

05-20 17:34:18.898: W/System.err(6272): java.io.IOException: Error running exec(). Command: [/] Working Directory: null Environment: null 
05-20 17:34:18.898: W/System.err(6272):  at java.lang.ProcessManager.exec(ProcessManager.java:211) 
05-20 17:34:18.898: W/System.err(6272):  at java.lang.Runtime.exec(Runtime.java:173) 
05-20 17:34:18.898: W/System.err(6272):  at java.lang.Runtime.exec(Runtime.java:128) 
05-20 17:34:18.898: W/System.err(6272):  at com.example.filetest.MainActivity.InstallAPK(MainActivity.java:59) 
05-20 17:34:18.898: W/System.err(6272):  at com.example.filetest.MainActivity.onCreate(MainActivity.java:43) 
05-20 17:34:18.898: W/System.err(6272):  at android.app.Activity.performCreate(Activity.java:5273) 
05-20 17:34:18.898: W/System.err(6272):  at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1101) 
05-20 17:34:18.898: W/System.err(6272):  at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2159) 
05-20 17:34:18.898: W/System.err(6272):  at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2245) 
05-20 17:34:18.898: W/System.err(6272):  at android.app.ActivityThread.access$800(ActivityThread.java:135) 
05-20 17:34:18.898: W/System.err(6272):  at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1196) 
05-20 17:34:18.898: W/System.err(6272):  at android.os.Handler.dispatchMessage(Handler.java:102) 
05-20 17:34:18.898: W/System.err(6272):  at android.os.Looper.loop(Looper.java:136) 
05-20 17:34:18.898: W/System.err(6272):  at android.app.ActivityThread.main(ActivityThread.java:5017) 
05-20 17:34:18.908: W/System.err(6272):  at java.lang.reflect.Method.invokeNative(Native Method) 
05-20 17:34:18.908: W/System.err(6272):  at java.lang.reflect.Method.invoke(Method.java:515) 
05-20 17:34:18.908: W/System.err(6272):  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:788) 
05-20 17:34:18.908: W/System.err(6272):  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:604) 
05-20 17:34:18.908: W/System.err(6272):  at dalvik.system.NativeStart.main(Native Method) 
05-20 17:34:18.908: W/System.err(6272): Caused by: java.io.IOException: Permission denied 
05-20 17:34:18.908: W/System.err(6272):  at java.lang.ProcessManager.exec(Native Method) 
05-20 17:34:18.908: W/System.err(6272):  at java.lang.ProcessManager.exec(ProcessManager.java:209) 
05-20 17:34:18.908: W/System.err(6272):  ... 18 more 

这里是我的清单

<?xml version="1.0" encoding="utf-8"?> 
<manifest xmlns:android="http://schemas.android.com/apk/res/android" 
package="com.example.filetest" 
android:versionCode="1" 
android:versionName="1.0" 
android:sharedUserId="android.uid.system" 
coreApp = "true" 
    > 

<uses-sdk 
    android:minSdkVersion="19" 
    android:targetSdkVersion="19" /> 
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/> 
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE"/> 
<uses-permission android:name="android.permission.INSTALL_PACKAGES"/> 
<uses-permission android:name="android.permission.DELETE_PACKAGES"/> 


<application 
    android:allowBackup="true" 
    android:icon="@drawable/ic_launcher" 
    android:label="@string/app_name" 
    android:theme="@style/AppTheme" 

    > 
    <activity 
     android:name=".MainActivity" 
     android:label="@string/app_name" > 
     <intent-filter> 
      <action android:name="android.intent.action.MAIN" /> 

      <category android:name="android.intent.category.LAUNCHER" /> 
     </intent-filter> 
    </activity> 
</application> 

</manifest> 

我无法得到我应该现在做..没有人知道如何解决它？

Answer 1

试试这个运行命令：

Process proc = Runtime.getRuntime().exec(new String[] { command }); 

代替本使用代码：

Process p = Runtime.getRuntime().exec("cd " + Environment.getExternalStorageDirectory() + "/.command"); 

而且也验证了您的命令字符串构造应correct.print在日志的子字符串。

Answer 2

由于您试图在根目录中创建文件，因此引发此异常。

创建新的文件时，让你的路径变得相对路径删除/开头：

File file = new File("storage/external_storage/sda1/FingerPCSettings");