在Android7.0的手机上，自动更新的时候出现包解析异常，在其他的手机上没有这个问题。
原因：
Android7.0引入私有目录被限制访问和StrictMode API 。私有目录被限制访问是指在Android7.0中为了提高应用的安全性，在7.0上应用私有目录将被限制访问。StrictMode API是指禁止向你的应用外公开 file:// URI。 如果一项包含文件 file:// URI类型 的 Intent 离开你的应用，则会报出异常。
解决办法：
第一步：在AndroidManifest.xml中注册provider，provider可以向应用外提供数据。
<provider
android:authorities="包名.fileprovider"
android:name="android.support.v4.content.FileProvider"
android:grantUriPermissions="true"//这是设置uri的权限
android:exported="false">
<meta-data
android:name="android.support.FILE_PROVIDER_PATHS"
android:resource="@xml/file_paths"/>//在第二步的时候会有介绍
</provider>
第二步：在res/xml中创建file_paths.xml文件。
<?xml version="1.0" encoding="utf-8"?>
<resources>
<paths>
<external-path path="" name="download" />
</paths>
</resources>
第三步：贴出我的自动更新下载的代码
public class UpdateManager {
private Context mContext;
private static String savePath ;
private String saveFileName ;
private ProgressBar mProgress; //下载进度条控件
private static final int DOWNLOADING = 1; //表示正在下载
private static final int DOWNLOADED = 2; //下载完毕
private static final int DOWNLOAD_FAILED = 3; //下载失败
private int progress; //下载进度
private boolean cancelFlag = false; //取消下载标志位
private String serverVersion; //从服务器获取的版本号
private String apkUrl;
// private String apkUrl = "http://liuliu.lejuhuyu.com/AndroidApk/liuliu-dashou-app-1.0.2.apk";
private String clientVersion; //客户端当前的版本号
private String updateDescription = "请更新当前最新版本"; //更新内容描述信息
private String forceUpdate; //是否强制更新
private String update;
private VersionBean mVersionBean;
private AlertDialog alertDialog1, alertDialog2; //表示提示对话框、进度条对话框
public UpdateManager(Context context,VersionBean versionBean) {
this.mContext = context;
this.mVersionBean = versionBean;
apkUrl = "http://liuliu.lejuhuyu.com/AndroidApk/liuliu-dashou-app-"+versionBean.getLastVersion()+".apk";
savePath = Environment.DIRECTORY_DOWNLOADS;
saveFileName = savePath + "/liuliu-dashou-app-"+versionBean.getLastVersion()+".apk";
}
/** 显示更新对话框 */
public void showNoticeDialog() {
serverVersion = mVersionBean.getLastVersion();
clientVersion = mVersionBean.getVersion();
L.e("apkUrl="+apkUrl);
L.e("savePath="+savePath);
L.e("saveFileName="+saveFileName);
// forceUpdate = StringUtils.getVersion();
// forceUpdate = "1";
forceUpdate = mVersionBean.getImportant();
update = mVersionBean.getUpdate();
//如果版本最新，则不需要更新
if (serverVersion.equals(clientVersion))
return;
if (update.equals("2"))
return;
AlertDialog.Builder dialog = new AlertDialog.Builder(mContext);
dialog.setTitle("发现新版本 ：" + serverVersion);
dialog.setMessage(updateDescription);
dialog.setPositiveButton("现在更新", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface arg0, int arg1) {
// TODO Auto-generated method stub
arg0.dismiss();
showDownloadDialog();
}
});
//是否强制更新
if (forceUpdate.equals("2")) {
dialog.setNegativeButton("待会更新", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface arg0, int arg1) {
// TODO Auto-generated method stub
arg0.dismiss();
}
});
}
alertDialog1 = dialog.create();
alertDialog1.setCancelable(false);
alertDialog1.show();
}
/** 显示进度条对话框 */
public void showDownloadDialog() {
AlertDialog.Builder dialog = new AlertDialog.Builder(mContext);
dialog.setTitle("正在更新");
final LayoutInflater inflater = LayoutInflater.from(mContext);
View v = inflater.inflate(R.layout.softupdate_progress, null);
mProgress = (ProgressBar) v.findViewById(R.id.update_progress);
dialog.setView(v);
//如果是强制更新，则不显示取消按钮
// if (forceUpdate.equals("1")) {
// dialog.setNegativeButton("取消", new DialogInterface.OnClickListener() {
// @Override
// public void onClick(DialogInterface arg0, int arg1) {
// // TODO Auto-generated method stub
// arg0.dismiss();
// cancelFlag = false;
// }
// });
// }
alertDialog2 = dialog.create();
alertDialog2.setCancelable(false);
alertDialog2.show();
//下载apk
downloadAPK();
}
DownloadManager manager;
Cursor cursor;
DownloadManager.Request down;
DownloadManager.Query query;
ContentObserver contentObserver;
/** 下载apk的线程 */
public void downloadAPK() {
manager = (DownloadManager) LiuLiuApplication.getContext().getSystemService(Context.DOWNLOAD_SERVICE);
down = new DownloadManager.Request(Uri.parse(apkUrl));
// 设置允许使用的网络类型，这里是移动网络和wifi都可以
down.setAllowedNetworkTypes(DownloadManager.Request.NETWORK_MOBILE
| DownloadManager.Request.NETWORK_WIFI);
// 显示下载界面
down.setVisibleInDownloadsUi(true);
// 设置下载路径和文件名
down.setDestinationInExternalPublicDir(Environment.DIRECTORY_DOWNLOADS, "liuliu-dashou-app-"+mVersionBean.getLastVersion() + ".apk");
down.setMimeType("application/vnd.android.package-archive");
// 设置为可被媒体扫描器找到
down.allowScanningByMediaScanner();
down.setAllowedOverRoaming(false);
// down.setNotificationVisibility(DownloadManager.Request.VISIBILITY_VISIBLE_NOTIFY_COMPLETED);
long id = manager.enqueue(down);
query = new DownloadManager.Query().setFilterById(id);
contentObserver = new ContentObserver(mHandler) {
@Override
public void onChange(boolean selfChange) {
// super.onChange(selfChange);
boolean downloading = true;
while(downloading){
cursor = manager.query(query);
try {
if (cursor != null && cursor.moveToFirst()) {
int bytes_downloaded = cursor.getInt(cursor.getColumnIndex(DownloadManager.COLUMN_BYTES_DOWNLOADED_SO_FAR));
int bytes_total = cursor.getInt(cursor.getColumnIndex(DownloadManager.COLUMN_TOTAL_SIZE_BYTES));
progress = (int) ((bytes_downloaded * 100) / bytes_total);
mHandler.sendEmptyMessage(DOWNLOADING);
if (cursor.getInt(cursor.getColumnIndex(DownloadManager.COLUMN_STATUS))==DownloadManager.STATUS_SUCCESSFUL) {
mHandler.sendEmptyMessage(DOWNLOADED);
}else if (cursor.getInt(cursor.getColumnIndex(DownloadManager.COLUMN_STATUS))==DownloadManager.STATUS_FAILED){
mHandler.sendEmptyMessage(DOWNLOAD_FAILED);
}
}
}catch (Exception e){
e.printStackTrace();
mHandler.sendEmptyMessage(DOWNLOAD_FAILED);
}finally {
if (cursor != null){
downloading = false;
cursor.close();
}
}
}
}
};
mContext.getContentResolver().registerContentObserver(Uri.parse("content://downloads/"),true,contentObserver);
}
/** 更新UI的handler */
private Handler mHandler = new Handler() {
@Override
public void handleMessage(Message msg) {
// TODO Auto-generated method stub
switch (msg.what) {
case DOWNLOADING:
mProgress.setProgress(progress);
break;
case DOWNLOADED:
if (alertDialog2 != null)
alertDialog2.dismiss();
installAPK();
break;
case DOWNLOAD_FAILED:
ToastUtil.getInstance(mContext,"网络断开，请稍候再试",false).show();
break;
default:
break;
}
}
};
/** 下载完成后自动安装apk */
public void installAPK() {
File apkFile = new File(Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DOWNLOADS),"liuliu-dashou-app-"+mVersionBean.getLastVersion() + ".apk");
if (!apkFile.exists()) {
return;
}
if (Build.VERSION.SDK_INT>=24){
Uri apkUri = FileProvider.getUriForFile(mContext, LiuLiuApplication.getContext().getPackageName()+".fileprovider", apkFile);
Intent install = new Intent(Intent.ACTION_VIEW);
install.addCategory(Intent.CATEGORY_DEFAULT);
install.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
install.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);
install.setDataAndType(apkUri, "application/vnd.android.package-archive");
mContext.startActivity(install);
} else {
Intent intent = new Intent();
intent.setAction(Intent.ACTION_VIEW);
intent.addCategory(Intent.CATEGORY_DEFAULT);
intent.setType("application/vnd.android.package-archive");
intent.setData(Uri.fromFile(apkFile));
intent.setDataAndType(Uri.fromFile(apkFile), "application/vnd.android.package-archive");
intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
mContext.startActivity(intent);
}
}
}
以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持亿速云。
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