// 申请su权限
    Process process = Runtime.getRuntime().exec("su");
    dataOutputStream = new DataOutputStream(process.getOutputStream());
    // 执行pm install命令
    String command = "pm install -r " + apkPath + "\n";
    dataOutputStream.write(command.getBytes(Charset.forName("utf-8")));
    dataOutputStream.flush();
    dataOutputStream.writeBytes("exit\n");
    dataOutputStream.flush();
    process.waitFor();
    errorStream = new BufferedReader(new InputStreamReader(process.getErrorStream()));
    String msg = "";
    String line;
    // 读取命令的执行结果
    while ((line = errorStream.readLine()) != null) {
      msg += line;
    }
    Log.d("TAG", "install msg is " + msg);
    // 如果执行结果中包含Failure字样就认为是安装失败，否则就认为安装成功
    if (!msg.contains("Failure")) {
      result = true;
    }

InstallAppProgress.java 
PackageInstallerActivity.java
+PackageInstallerActivityHide.java
PackageUtil.java 
UninstallAppProgress.java
UninstallerActivity.java
+UninstallerActivityHide.java

<application android:label="@string/app_name">
<activity android:name=".PackageInstallerActivity" android:theme="@android:style/Theme.Holo.DialogWhenLarge" android:configChanges="orientation|keyboardHidden"> 
<intent-filter> 
<action android:name="android.intent.action.VIEW"/> 
<category android:name="android.intent.category.DEFAULT"/> 
<data android:scheme="content"/> 
<data android:scheme="file"/> 
<data android:mimeType="application/vnd.android.package-archive"/> 
</intent-filter> 
</activity> 
<activity android:name=".PackageInstallerHideActivity" android:theme="@android:style/Theme.NoDisplay" android:configChanges="orientation|keyboardHidden"> 
<intent-filter> 
<action android:name="android.intent.action.VIEW.HIDE"/> 
<category android:name="android.intent.category.DEFAULT"/> 
<data android:scheme="content"/> 
<data android:scheme="file"/> 
<data android:mimeType="application/vnd.android.package-archive"/> 
</intent-filter> 
</activity> 
<activity android:name=".UninstallerActivityHide" android:theme="@android:style/Theme.NoDisplay" android:configChanges="orientation|keyboardHidden" android:excludeFromRecents="true"> 
<intent-filter> 
<action android:name="android.intent.action.VIEW"/> 
<action android:name="android.intent.action.DELETE.HIDE"/> 
<category android:name="android.intent.category.DEFAULT"/> 
<data android:scheme="package"/> 
</intent-filter> 
</activity>

Intent install_hide_intent = new Intent("android.intent.action.VIEW.HIDE"); 
install_hide_intent .setDataAndType(Uri.parse("[file:///sdcard/hello.apk](file:///sdcard/hello.apk)"),
"application/vnd.android.package-archive"); 
startActivityForResult(install_hide_intent, INSTALL_RUSULT);