Android 4.0.4系统下实现apk的静默安装和启动

最近在Android 4.0.4系统下实现apk的静默安装和启动的功能，这里和大家分享一下，希望能有所帮助。

源码如下：

import java.io.DataOutputStream;
import java.io.File;
import java.io.IOException;
import java.io.OutputStream;
import java.util.ArrayList;
import java.util.List;

import android.content.Context;
import android.content.Intent;
import android.content.pm.ActivityInfo;
import android.content.pm.PackageInfo;
import android.content.pm.PackageManager;
import android.content.pm.ResolveInfo;

public class InstallApkUtils {
 
 public static void installAndStartApk(final Context context, final String apkPath) {
  if ((apkPath==null) || (context==null)) {
   return;
  }
 
  File file = new File(apkPath);
  if (file.exists() == false) {
   return;
  }
 
  new Thread() {
   public void run() {
    String packageName = getUninstallApkPackageName(context, apkPath);
    if (silentInstall(apkPath)) {
     List<ResolveInfo> matches = findActivitiesForPackage(context, packageName);
     if ((matches!=null) && (matches.size()>0)) {
      ResolveInfo resolveInfo = matches.get(0);
      ActivityInfo activityInfo = resolveInfo.activityInfo;
      startApk(activityInfo.packageName, activityInfo.name);
     }
    }
   };
  }.start();

}
 
 public static String getUninstallApkPackageName(Context context, String apkPath) {
  String packageName = null;
  if (apkPath == null) {
   return packageName;
  }
 
  PackageManager pm = context.getPackageManager();
  PackageInfo info = pm.getPackageArchiveInfo(apkPath,
    PackageManager.GET_ACTIVITIES);
  if (info == null) {
   return packageName;
  }
 
  packageName = info.packageName;
  return packageName;
 }
 
    public static List<ResolveInfo> findActivitiesForPackage(Context context, String packageName) {
        final PackageManager pm = context.getPackageManager();

final Intent mainIntent = new Intent(Intent.ACTION_MAIN, null);
        mainIntent.addCategory(Intent.CATEGORY_LAUNCHER);
        mainIntent.setPackage(packageName);

final List<ResolveInfo> apps = pm.queryIntentActivities(mainIntent, 0);
        return apps != null ? apps : new ArrayList<ResolveInfo>();
    }
   
 public static boolean silentInstall(String apkPath) {
  String cmd1 = "chmod 777 " + apkPath + " \n";
  String cmd2 = "LD_LIBRARY_PATH=/vendor/lib:/system/lib pm install -r " + apkPath + " \n";
  return execWithSID(cmd1, cmd2);
 }
 
 private static boolean execWithSID(String... args) {
  boolean isSuccess = false;
  Process process = null;
  OutputStream out = null;
  try {
   process = Runtime.getRuntime().exec("su");
   out = process.getOutputStream();
   DataOutputStream dataOutputStream = new DataOutputStream(out);

for (String tmp : args) {
    dataOutputStream.writeBytes(tmp);
   }

dataOutputStream.flush(); // 提交命令
   dataOutputStream.close(); // 关闭流操作
   out.close();
   
   isSuccess = waitForProcess(process);
  } catch (IOException e) {
   e.printStackTrace();
  }

return isSuccess;
 }
   
 public static boolean startApk(String packageName, String activityName) {
  boolean isSuccess = false;
 
  String cmd = "am start -n " + packageName + "/" + activityName + " \n";
  try {
   Process process = Runtime.getRuntime().exec(cmd);
   
   isSuccess = waitForProcess(process);
  } catch (IOException e) {
   NLog.i(TAG, e.getMessage());
   e.printStackTrace();
  }
  return isSuccess;
 }
 
 private static boolean waitForProcess(Process p) {
  boolean isSuccess = false;
  int returnCode;
  try {
   returnCode = p.waitFor();
   switch (returnCode) {
   case 0:
    isSuccess = true;
    break;
   
   case 1:
    break;
   
   default:
    break;
   }
  } catch (InterruptedException e) {
   e.printStackTrace();
  }

return isSuccess;
 }
}

如果要使用，还需以下步骤：

1、在AndroidManifest.xml文件里添加如下权限：

<uses-permission android:name="android.permission.INSTALL_PACKAGES" />

2、进行系统签名。命令如下：

java -jar signapk.jar platform.x509.pem platform.pk8    XXX.apk    Signed_XXX.apk

好了，现在大功告成！！！