android 安装apk

private static void update() {
    if(BGIApplication.getInstance().getCurrentActivity() == null || file == null || !file.exists())
        return;
    //安装应用
    Intent intent = new Intent(Intent.ACTION_VIEW);
    //判断是否是Android7.0以及更高的版本
    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) {
        intent.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);
        Uri contentUri = FileProvider.getUriForFile(BGIApplication.getInstance().getCurrentActivity(), “com.bgi.explorationmanager.authorities”, file);
        intent.setDataAndType(contentUri, "application/vnd.android.package-archive");
    } else {
        intent.setDataAndType(Uri.fromFile(file),
                "application/vnd.android.package-archive");
    }
    intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
    BGIApplication.getInstance().startActivity(intent);
    System.exit(0);
}

provider设置

<provider
    android:name="android.support.v4.content.FileProvider"
    android:authorities="com.bgi.explorationmanager.authorities"
    android:exported="false"
    android:grantUriPermissions="true">
    <meta-data
        android:name="android.support.FILE_PROVIDER_PATHS"
        android:resource="@xml/file_paths" />
</provider>