app自动更新安装完毕并打开

private void downloadAPK() {
//        // 判断sd卡状态是否正常
//        if (!Environment.getExternalStorageState().equals(
//                Environment.MEDIA_MOUNTED)) {
//            Toast.makeText(getApplicationContext(), "sd卡异常", Toast.LENGTH_SHORT).show();
//            return;
//        }
final ProgressDialog pDialog = new ProgressDialog(this);
// 设置进度条为横向进度条
pDialog.setProgressStyle(ProgressDialog.STYLE_HORIZONTAL);
//        pDialog.show();
pDialog.setCanceledOnTouchOutside(false);   //点击progress以外的地方不消失

OkHttpUtils
.get()
.url(Global.UPGRADE_NEW)
.build()
.execute(new FileCallBack(Environment.getExternalStorageDirectory().getAbsolutePath(), "universe3000.apk") {
@Override
public void onError(Call call, Exception e, int id) {
// 下载失败后进度条消失
pDialog.dismiss();
}

@Override
public void onResponse(File response, int id) {
installAPK(response);
}

@Override
public void inProgress(float progress, long total, int id) {
super.inProgress(progress, total, id);

pDialog.setMax(100);
pDialog.setProgress((int) (progress * 100));

}

@Override
public void onBefore(okhttp3.Request request, int id) {
super.onBefore(request, id);
pDialog.show();
}
});

}

/*
* 安装apk
*
* @param apkFile
*/
private static final int REQUEST_CODE_INSTALL = 1001;

protected void installAPK(File apkFile) {
// 隐式调用系统的安装页面
// <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>

Intent intent = new Intent();
if(Build.VERSION.SDK_INT>=24) { //判读版本是否在7.0以上
//添加这一句表示对目标应用临时授权该Uri所代表的文件
intent.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);
}else {

// intent.setAction("android.intent.action.VIEW");
intent.setAction(Intent.ACTION_VIEW);
intent.addCategory("android.intent.category.DEFAULT");
}
intent.setDataAndType(Uri.fromFile(apkFile),
"application/vnd.android.package-archive");
intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
startActivityForResult(intent, REQUEST_CODE_INSTALL);
}