拍照、下载apk的Android版本的适配问题(Android6.0 Android7.0 Android8.0)
作者:互联网
在官方7.0的以上的系统中,尝试传递 file://URI可能会触发FileUriExposedException。google提供了FileProvider,使用它可以生成content://Uri来替代file://Uri
使用FileProvider兼容拍照
(1)声明provider
<provider
android:name="android.support.v4.content.FileProvider"
android:authorities="com.zhy.android7.fileprovider"
android:exported="false"
android:grantUriPermissions="true">
<meta-data
android:name="android.support.FILE_PROVIDER_PATHS"
android:resource="@xml/file_paths" />
</provider>
(2)编写resource xml file
<paths>
<external-path name="external" path="/" />
<external-path
name="cache"
path="cache/" />
<external-files-path name="external_file_path" path="." />
</paths>
(3)使用FileProvider API
好了,接下来就可以通过FileProvider把我们的file转化为content://uri
了~
public void takePhotoNoCompress(View view) {
Intent takePictureIntent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
if (takePictureIntent.resolveActivity(getPackageManager()) != null) {
String filename = new SimpleDateFormat("yyyyMMdd-HHmmss", Locale.CHINA)
.format(new Date()) + ".png";
File file = new File(Environment.getExternalStorageDirectory(), filename);
Uri fileUri = FileProviderForAPI24.getUriForFile(this, file);
takePictureIntent.putExtra(MediaStore.EXTRA_OUTPUT, fileUri);
startActivityForResult(takePictureIntent, REQUEST_CODE_TAKE_PHOTO);
}
}
public final class FileProviderUtils {
public static Uri getUriForFile(Context context, File file) {
Uri fileUri = null;
if (Build.VERSION.SDK_INT >= 24) {
fileUri = getUriForFile24(context, file);
} else {
fileUri = Uri.fromFile(file);
}
return fileUri;
}
public static Uri getUriForFile24(Context context, File file) {
Uri fileUri = android.support.v4.content.FileProvider.getUriForFile(context,
"com.zhy.android7.fileprovider",
file);
return fileUri;
}
public static void setIntentDataAndType(Context context,
Intent intent,
String type,
File file,
boolean writeAble) {
if (Build.VERSION.SDK_INT >= 24) {
intent.setDataAndType(getUriForFile(context, file), type);
intent.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);
if (writeAble) {
intent.addFlags(Intent.FLAG_GRANT_WRITE_URI_PERMISSION);
}
} else {
intent.setDataAndType(Uri.fromFile(file), type);
}
}
使用FileProvider兼容安装apk
Android6.0
Android6.0的终极代码
public void installApk(View view) {
File file = new File(Environment.getExternalStorageDirectory(), "testandroid7-debug.apk");
Intent intent = new Intent(Intent.ACTION_VIEW);
intent.setDataAndType(Uri.fromFile(file),
"application/vnd.android.package-archive");
startActivity(intent);
}
Android7.0
Android7.0的代码,需要用FileProvider
if (Build.VERSION.SDK_INT >= 24) {
fileUri = FileProvider.getUriForFile(this, "com.zhy.android7.fileprovider", file);
} else {
fileUri = Uri.fromFile(file);
}
还需要加上权限
intent.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION | Intent.FLAG_GRANT_WRITE_URI_PERMISSION);
终极代码
public void installApk(View view) {
File downloadfile= new File(Environment.getExternalStorageDirectory(), "testandroid7-debug.apk");
val apkUri = getUriForFile24(context, downloadfile)
Intent intent = new Intent(Intent.ACTION_VIEW);
intent.addFlags(Intent.FLAG_GRANT_WRITE_URI_PERMISSION)
intent.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION)
intent.setDataAndType(apkUri , "application/vnd.android.package-archive");
startActivity(intent);
}
Android8.0
Android 8.0去除了“允许未知来源”选项,所以如果我们的App有安装App的功能(检查更新之类的),那么会无法正常安装。
首先在AndroidManifest
文件中添加安装未知来源应用的权限:
<uses-permission android:name="android.permission.REQUEST_INSTALL_PACKAGES"/>
这样系统会自动询问用户完成授权。当然你也可以先使用 canRequestPackageInstalls()
查询是否有此权限,如果没有的话使用Settings.ACTION_MANAGE_UNKNOWN_APP_SOURCES
这个action将用户引导至安装未知应用权限界面去授权。
private static final int REQUEST_CODE_UNKNOWN_APP = 100;
private void installAPK(){
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
boolean isGranted = getPackageManager().canRequestPackageInstalls();
if (isGranted ) {
//安装应用
} else {
//跳转至“安装未知应用”权限界面,引导用户开启权限
Uri selfPackageUri = Uri.parse("package:" + this.getPackageName());
Intent intent = new Intent(Settings.ACTION_MANAGE_UNKNOWN_APP_SOURCES, selfPackageUri);
startActivityForResult(intent, REQUEST_CODE_UNKNOWN_APP);
}
}else {
//安装应用
}
}
//接收“安装未知应用”权限的开启结果
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
if (requestCode == REQUEST_CODE_UNKNOWN_APP) {
installAPK();
}
}
本文参考鸿洋大神的适配文章
jingerlovexiaojie 发布了11 篇原创文章 · 获赞 2 · 访问量 7132 私信 关注标签:适配,Uri,Android7.0,apk,intent,file,new,Intent,fileUri 来源: https://blog.csdn.net/jingerlovexiaojie/article/details/104633594