自动更新中的问题。如果有可用更新，则下载新应用并卸载当前应用并安装新应用。这一切都运行良好，直到目标SDK 22.但目标SDK 24或更新电话操作系统以上API级别2此功能不起作用每当我安装它显示包解析错误。因为旧的应用程序已经存在，我们正在尝试安装新的应用程序。
targetSDK：24
compileSDK：28
minSDK：19
这是一段代码：
public class UpdateActivity extends AppCompatActivity implements AppConstants {
public static final String TAG = UpdateActivity.class.getSimpleName();
private String appName = "XYZ.apk";
private final Handler mHideHandler = new Handler();
private View mContentView;
private TextView txtDownloading;
private NumberProgressBar numberProgressBar;
private String updateUrl = "";
private final Runnable mHidePart2Runnable = new Runnable() {
@SuppressLint("InlinedApi")
@Override
public void run() {
// Delayed removal of status and navigation bar
mContentView.setSystemUiVisibility(View.SYSTEM_UI_FLAG_LOW_PROFILE
| View.SYSTEM_UI_FLAG_FULLSCREEN
| View.SYSTEM_UI_FLAG_LAYOUT_STABLE
| View.SYSTEM_UI_FLAG_IMMERSIVE_STICKY
| View.SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION
| View.SYSTEM_UI_FLAG_HIDE_NAVIGATION);
}
};
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_update);
updateUrl = getIntent().getStringExtra("url");
StrictMode.setThreadPolicy(new StrictMode.ThreadPolicy.Builder().permitAll().build());
mContentView = findViewById(R.id.fullscreen_content);
mHideHandler.post(mHidePart2Runnable);
numberProgressBar = (NumberProgressBar) findViewById(R.id.numberbar8);
txtDownloading = (TextView) findViewById(R.id.txtDownload);
try {
new DownloadFileFromURL().execute();
} catch (Exception e) {
e.printStackTrace();
}
}
private class DownloadFileFromURL extends AsyncTask<String, Integer, String> {
DownloadFileFromURL() {
}
protected void onPreExecute() {
super.onPreExecute();
}
protected String doInBackground(String... f_url) {
try {
HttpURLConnection c = (HttpURLConnection) new URL(updateUrl).openConnection();
c.setRequestMethod("POST");
c.setDoOutput(false);
c.connect();
int lengthOfFile = c.getContentLength();
File file = new File(Environment.getExternalStorageDirectory().getPath() + "/Download/");
file.mkdirs();
File outputFile = new File(file, appName);
if (outputFile.exists()) {
outputFile.delete();
}
FileOutputStream fos = new FileOutputStream(outputFile);
InputStream is = c.getInputStream();
byte[] data = new byte[AccessibilityNodeInfoCompat.ACTION_NEXT_HTML_ELEMENT];
long total1 = 0;
while (true) {
int count = is.read(data);
if (count == -1) {
break;
}
total1 += (long) count;
Integer[] strArr = new Integer[1];
strArr[0] = DOWNLOAD_COUNT + ((int) ((100 * total1) / ((long) lengthOfFile)));
publishProgress(strArr);
fos.write(data, 0, count);
}
fos.close();
is.close();
installApp();
} catch (Exception e) {
Log.e("Error: ", e.getMessage());
}
return null;
}
protected void onProgressUpdate(Integer... progress) {
try {
numberProgressBar.setUnreachedBarColor(Color.parseColor("#CCCCCC"));
numberProgressBar.setProgressTextSize(30.0f);
if (progress[0] > 0 && progress[0] <= 20) {
numberProgressBar.setProgressTextColor(Color.parseColor("#E74C3C"));
numberProgressBar.setReachedBarColor(Color.parseColor("#E74C3C"));
txtDownloading.setTextColor(Color.parseColor("#E74C3C"));
}
if (progress[0] > 20 && progress[0] <= 40) {
numberProgressBar.setProgressTextColor(Color.parseColor("#FF3D7F"));
numberProgressBar.setReachedBarColor(Color.parseColor("#FF3D7F"));
txtDownloading.setTextColor(Color.parseColor("#FF3D7F"));
}
if (progress[0] > 40 && progress[0] <= 60) {
numberProgressBar.setProgressTextColor(Color.parseColor("#FFC73B"));
numberProgressBar.setReachedBarColor(Color.parseColor("#FFC73B"));
txtDownloading.setTextColor(Color.parseColor("#FFC73B"));
}
if (progress[0] > 60 && progress[0] <= 80) {
numberProgressBar.setProgressTextColor(Color.parseColor("#6DBCDB"));
numberProgressBar.setReachedBarColor(Color.parseColor("#6DBCDB"));
txtDownloading.setTextColor(Color.parseColor("#6DBCDB"));
}
if (progress[0] > 80 && progress[0] <= 100) {
numberProgressBar.setProgressTextColor(Color.parseColor("#70A800"));
numberProgressBar.setReachedBarColor(Color.parseColor("#70A800"));
txtDownloading.setTextColor(Color.parseColor("#70A800"));
}
numberProgressBar.setProgress(progress[0]);
} catch (Exception e) {
e.printStackTrace();
}
}
protected void onPostExecute(String file_url) {
numberProgressBar.setVisibility(View.GONE);
}
}
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
}
private void installApp() {
try {
File apkFile = new File(Environment.getExternalStorageDirectory().getPath() + "/Download/", appName);
Intent intent = new Intent("android.intent.action.VIEW");
intent.setDataAndType(Uri.fromFile(apkFile), "application/vnd.android.package-archive");
intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
startActivity(intent);
finish();
} catch (Exception e) {
e.printStackTrace();
}
}
}
我遇到了同样的问题，并使用以下方法解决了这个问题：
File Uri，而是必须使用来自FileProvider类的Provider Uri，否则我们将获得FileUriExposedException，如android.os.FileUriExposedException: file:///storage/emulated/0/test.txt exposed beyond app through Intent.getData()等。有关如何设置FileProvider的更多信息，请参阅本指南：https://developer.android.com/reference/android/support/v4/content/FileProvider
希望这可以帮助。