来自SD卡的Android安装.apk编程错误-包解析错误

我正试图用以下代码安装存储在下载文件夹下的外部存储中的.apk文件。我收到了一个错误对话框，其中包含一条消息：解析包时出现问题。我正在使用从google play store下载的production.apk文件和debug.apk文件。对于这两个文件，我在以编程方式安装.apk时会看到相同的错误屏幕。我可以手动安装相同的.apk文件，因此文件中没有问题。我甚至将此应用程序设置为设备所有者，但它仍然不起作用。有没有办法安装.apk文件

            Uri mUri_ = Uri.parse(filePath);
            String packageName = "com.neo.apkinstaller";
            context.grantUriPermission(packageName, mUri_, Intent.FLAG_GRANT_WRITE_URI_PERMISSION | Intent.FLAG_GRANT_READ_URI_PERMISSION);
            try {
                Intent appInstallerIntent = null;
                if (Build.VERSION.SDK_INT <= Build.VERSION_CODES.N) {
                    appInstallerIntent = new Intent(Intent.ACTION_VIEW);
                    appInstallerIntent.setDataAndType(Uri.fromFile(new File(inst_path)), "application/vnd.android.package-archive");
                } else {
                    Uri uri = FileProvider.getUriForFile(context, "com.neo.apkinstaller", new File(inst_path));
                    appInstallerIntent = new Intent(Intent.ACTION_INSTALL_PACKAGE);
                    appInstallerIntent.setData(uri);
                    appInstallerIntent.setFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION | Intent.FLAG_GRANT_WRITE_URI_PERMISSION);
                }
                appInstallerIntent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK | Intent.FLAG_ACTIVITY_CLEAR_TOP);
                context.startActivity(appInstallerIntent);
            } catch (Exception e) {
                e.printStackTrace();
            }

urimuri=Uri.parse（filePath）； 字符串packageName=“com.neo.apkinstaller”； context.grantUriPermission（packageName、mUri、Intent.FLAG授予写入URI权限、Intent.FLAG授予读取URI权限）； 试一试{ Intent appInstallerIntent=null；

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如果（Build.VERSION.SDK_INT，您可以查看本youtube教程的结尾。 有一个apk是按程序安装的。 您可以忽略dropbox内容的第一部分；）

源代码是：

private void AutoUpdate (String NameOfNewApplication, String downloadPathFrom)
{
    DropboxDownloadPathTo = NameOfNewApplication;
    DropboxDownloadPathFrom = downloadPathFrom;
    runOnUiThread(new Runnable() {
        @Override
        public void run() {
            Toast.makeText(getApplicationContext(), "Download file ...", Toast.LENGTH_SHORT).show();
            Thread th = new Thread(new Runnable() {
                public void run() {
                    File file = new File(DropboxDownloadPathTo + DropboxDownloadPathFrom.substring(DropboxDownloadPathFrom.lastIndexOf('.')));
                    if (file.exists()) file.delete();
                    try {
                        FileOutputStream outputStream = new FileOutputStream(file);
                        main.dropboxAPI.getFile(DropboxDownloadPathFrom, null, outputStream, null);
                        getMain().runOnUiThread(new Runnable() {
                            @Override
                            public void run() {
                                Toast.makeText(getApplicationContext(), "File successfully downloaded.", Toast.LENGTH_SHORT).show();
                            }
                        });
                    } catch (Exception e) {
                        e.printStackTrace();
                    }
                    if(file.exists())
                    {
                        while (file.length() == 0)
                        {
                            try {Thread.sleep(100);} catch (InterruptedException e) {e.printStackTrace();}
                        }

                        Intent intent = new Intent(Intent.ACTION_VIEW);
                        intent.setDataAndType(Uri.fromFile(file), "application/vnd.android.package-archive");
                        intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
                        startActivity(intent);
                    }
                }
            });
            th.start();
        }
    });
}

---

你可以看看这个youtube教程的结尾。 有一个apk是按程序安装的。 您可以忽略dropbox内容的第一部分；）

源代码是：

private void AutoUpdate (String NameOfNewApplication, String downloadPathFrom)
{
    DropboxDownloadPathTo = NameOfNewApplication;
    DropboxDownloadPathFrom = downloadPathFrom;
    runOnUiThread(new Runnable() {
        @Override
        public void run() {
            Toast.makeText(getApplicationContext(), "Download file ...", Toast.LENGTH_SHORT).show();
            Thread th = new Thread(new Runnable() {
                public void run() {
                    File file = new File(DropboxDownloadPathTo + DropboxDownloadPathFrom.substring(DropboxDownloadPathFrom.lastIndexOf('.')));
                    if (file.exists()) file.delete();
                    try {
                        FileOutputStream outputStream = new FileOutputStream(file);
                        main.dropboxAPI.getFile(DropboxDownloadPathFrom, null, outputStream, null);
                        getMain().runOnUiThread(new Runnable() {
                            @Override
                            public void run() {
                                Toast.makeText(getApplicationContext(), "File successfully downloaded.", Toast.LENGTH_SHORT).show();
                            }
                        });
                    } catch (Exception e) {
                        e.printStackTrace();
                    }
                    if(file.exists())
                    {
                        while (file.length() == 0)
                        {
                            try {Thread.sleep(100);} catch (InterruptedException e) {e.printStackTrace();}
                        }

                        Intent intent = new Intent(Intent.ACTION_VIEW);
                        intent.setDataAndType(Uri.fromFile(file), "application/vnd.android.package-archive");
                        intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
                        startActivity(intent);
                    }
                }
            });
            th.start();
        }
    });
}

---

即使使用相同的意图调用，我在Lenovo K5 note（Android m）中也会遇到解析包错误。在Android N以上，我们需要一个文件提供程序。即使使用相同的意图调用，我在Lenovo K5 note（Android m）中也会遇到解析包错误。在Android N以上，我们需要一个文件提供程序。

private void AutoUpdate (String NameOfNewApplication, String downloadPathFrom)
{
    DropboxDownloadPathTo = NameOfNewApplication;
    DropboxDownloadPathFrom = downloadPathFrom;
    runOnUiThread(new Runnable() {
        @Override
        public void run() {
            Toast.makeText(getApplicationContext(), "Download file ...", Toast.LENGTH_SHORT).show();
            Thread th = new Thread(new Runnable() {
                public void run() {
                    File file = new File(DropboxDownloadPathTo + DropboxDownloadPathFrom.substring(DropboxDownloadPathFrom.lastIndexOf('.')));
                    if (file.exists()) file.delete();
                    try {
                        FileOutputStream outputStream = new FileOutputStream(file);
                        main.dropboxAPI.getFile(DropboxDownloadPathFrom, null, outputStream, null);
                        getMain().runOnUiThread(new Runnable() {
                            @Override
                            public void run() {
                                Toast.makeText(getApplicationContext(), "File successfully downloaded.", Toast.LENGTH_SHORT).show();
                            }
                        });
                    } catch (Exception e) {
                        e.printStackTrace();
                    }
                    if(file.exists())
                    {
                        while (file.length() == 0)
                        {
                            try {Thread.sleep(100);} catch (InterruptedException e) {e.printStackTrace();}
                        }

                        Intent intent = new Intent(Intent.ACTION_VIEW);
                        intent.setDataAndType(Uri.fromFile(file), "application/vnd.android.package-archive");
                        intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
                        startActivity(intent);
                    }
                }
            });
            th.start();
        }
    });
}