我也遇到类似的问题，但是我正在使用Flutter开发我的应用程序。使用我的代码，我可以更改主屏幕墙纸，但不适用于设置锁定屏幕或同时设置两者。
还有另一个问题....我能够在Android api级别24和更高级别上设置主屏幕墙纸
MainActivity代码：
package com.eabesh.wallpaper_app
import android.os.Bundle
import io.flutter.app.FlutterActivity
import io.flutter.plugin.common.MethodChannel
import java.io.IOException
import android.app.WallpaperManager
import android.graphics.BitmapFactory
import android.os.Build
import android.annotation.TargetApi
import android.content.Context
import io.flutter.plugins.GeneratedPluginRegistrant
private const val CHANNEL = "com.eabesh.wallpaperapp/wallpapers"
class MainActivity: FlutterActivity() {
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
GeneratedPluginRegistrant.registerWith(this)
MethodChannel(flutterView, CHANNEL).setMethodCallHandler { call, result ->
if (call.method == "setWallpaper") {
val arguments = call.arguments as ArrayList<*>
val setWallpaper = setWallpaper(arguments[0] as String, applicationContext, arguments[1] as Int)
if (setWallpaper == 0) {
result.success(setWallpaper)
} else {
result.error("UNAVAILABLE", "", null)
}
} else {
result.notImplemented()
}
}
}
@TargetApi(24)
private fun setWallpaper(path: String, applicationContext: Context, wallpaperType: Int): Int {
var setWallpaper=1
val bitmap = BitmapFactory.decodeFile(path)
val wm: WallpaperManager? = WallpaperManager.getInstance(applicationContext)
setWallpaper = try {
wm?.setBitmap(bitmap, null, true, wallpaperType)
0
} catch (e: IOException) {
1
}
return setWallpaper
}
}
全屏代码：
import 'package:flutter/material.dart';
import 'package:cached_network_image/cached_network_image.dart';
import 'package:flutter/painting.dart';
import 'package:photo_view/photo_view.dart';
import 'package:fluttertoast/fluttertoast.dart';
import 'package:flutter/services.dart';
import 'package:image_downloader/image_downloader.dart';
import 'package:flutter_cache_manager/flutter_cache_manager.dart';
import 'dart:async';
import 'package:path_provider/path_provider.dart';
import 'package:dio/dio.dart';
import 'dart:io' as Io;
class FullScreenImagePage extends StatefulWidget {
final String imgPath;
final String imgName;
FullScreenImagePage(this.imgPath,this.imgName);
@override
_FullScreenImagePageState createState() => _FullScreenImagePageState();
}
class _FullScreenImagePageState extends State<FullScreenImagePage> {
static const platform = const
MethodChannel('com.eabesh.wallpaperapp/wallpapers');
bool permission = false;
bool downloading = false;
var progress = '';
var _progresss;
String _batteryLevel = 'Unknown battery level.';
@override
void initState() {
// TODO: implement initState
super.initState();
//getPermission();
ImageDownloader.callback(onProgressUpdate: (String imageId, int
progress) {
setState(() {
_progresss = progress;
print('>>>>>>>>>>>>>>>>>>$_progresss');
});
});
}
final LinearGradient backgroundGradient = new LinearGradient(
colors: [new Color(0x10000000), new Color(0x30000000)],
begin: Alignment.topLeft,
end: Alignment.bottomRight);
void toastFunction(context, message) {
//Toast.show("Double Tap to Zoom",context, duration: Toast.LENGTH_SHORT,
gravity: Toast.BOTTOM);
Fluttertoast.showToast(
msg: "$message",
toastLength: Toast.LENGTH_SHORT,
gravity: ToastGravity.BOTTOM,
timeInSecForIos: 1,
textColor: Colors.white,
fontSize: 16.0);
}
IconData changeIcon() {
if (_progresss == 100) {
setState(() {
return Icons.done;
});
} else {
setState(() {
return Icons.arrow_downward;
});
}
return Icons.arrow_downward;
}
@override
Widget build(BuildContext context) {
double height = MediaQuery
.of(context)
.size
.height;
double width = MediaQuery
.of(context)
.size
.width;
//toastFunction(context, 'Double tap to Zoom');
return new Scaffold(
body: new SizedBox.expand(
child: new Container(
decoration: new BoxDecoration(gradient: backgroundGradient),
child: new Stack(
children: <Widget>[
new Align(
alignment: Alignment.center,
child: PhotoView(
imageProvider: CachedNetworkImageProvider(widget.imgPath),
loadingChild: CircularProgressIndicator(),
//childSize: Size(width, height),
//initialScale: PhotoViewComputedScale.covered*height,
minScale: PhotoViewComputedScale.contained * 0.8,
maxScale: PhotoViewComputedScale.covered * 1.8,
heroAttributes: PhotoViewHeroAttributes(tag: widget.imgPath),
//initialScale: height,
),
),
GestureDetector(
onTap: () {
Navigator.of(context).pop();
},
child: new Align(
alignment: Alignment.bottomRight,
child: Container(
margin: EdgeInsets.all(20),
padding: EdgeInsets.all(10),
decoration: BoxDecoration(
borderRadius: BorderRadius.circular(100),
border: Border.all(width: 2, color: Colors.white)),
child: Icon(
Icons.cancel,
color: Colors.white,
),
)),
),
GestureDetector(
onTap: () async {
try {
toastFunction(context, 'Image Downloading In Background');
var imageId = await ImageDownloader.downloadImage(
widget.imgPath,
destination: AndroidDestinationType.custom()
..subDirectory("Hd walls/image.jpeg"),
);
} catch (e) {
print(e);
}
},
child: new Align(
alignment: Alignment.bottomCenter,
child: Container(
margin: EdgeInsets.all(20),
padding: EdgeInsets.all(10),
decoration: BoxDecoration(
borderRadius: BorderRadius.circular(100),
border: Border.all(width: 2, color: Colors.white)),
child: Icon(
(_progresss != 100) ? Icons.arrow_downward : Icons.done,
color: Colors.white,
),
)),
),
new Align(
alignment: Alignment.bottomLeft,
child: GestureDetector(
onTap: () {
setWallpaperDialog();
///_getBatteryLevel();
},
child: Container(
margin: EdgeInsets.all(20),
padding: EdgeInsets.all(10),
decoration: BoxDecoration(
borderRadius: BorderRadius.circular(100),
border: Border.all(width: 2, color: Colors.white)),
child: Icon(
Icons.image,
color: Colors.white,
),
),
),
)
],
),
),
),
);
}
//function for the setting wallpaper in android;
void setWallpaperDialog() {
showDialog(
context: context,
builder: (context) {
return Dialog(
backgroundColor: Colors.white,
child: Column(
mainAxisSize: MainAxisSize.min,
crossAxisAlignment: CrossAxisAlignment.start,
children: <Widget>[
Padding(
padding: const EdgeInsets.all(16.0),
child: Text(
'Set a wallpaper',
style: TextStyle(
fontSize: 20.0,
fontWeight: FontWeight.bold,
color: Colors.black,
),
),
),
ListTile(
title: Text(
'Home Screen',
style: TextStyle(color: Colors.black),
),
leading: Icon(
Icons.home,
color: Colors.black,
),
onTap: () => _setWallpaper(1),
),
ListTile(
title: Text(
'Lock Screen',
style: TextStyle(color: Colors.black),
),
leading: Icon(
Icons.lock,
color: Colors.black,
),
onTap: () => _setWallpaper(2),
),
ListTile(
title: Text(
'Both',
style: TextStyle(color: Colors.black),
),
leading: Icon(
Icons.phone_android,
color: Colors.black,
),
onTap: () => _setWallpaper(3),
),
],
),
);
},
);
}
Future<void> _setWallpaper(int wallpaperType) async {
var file =
await DefaultCacheManager().getSingleFile(widget.imgPath);
try {
final int result = await platform
.invokeMethod(
'setWallpaper',[file.path,wallpaperType]);
print('Wallpaper Updated.... $result');
} on PlatformException catch (e) {
print("Failed to Set Wallpaper: '${e.message}'.");
}
Fluttertoast.showToast(
msg: "Wallpaper set successfully",
toastLength: Toast.LENGTH_SHORT,
gravity: ToastGravity.CENTER,
timeInSecForIos: 1,
backgroundColor: Colors.white,
textColor: Colors.black,
fontSize: 16.0);
Navigator.pop(context);
}
Future<void> _getBatteryLevel() async {
String batteryLevel;
try {
final int result = await platform.invokeMethod(
'getBatteryLevel', {"path": "fuck bo"});
batteryLevel = 'Battery level at $result % .';
} on PlatformException catch (e) {
batteryLevel = "Failed to get battery level: '${e.message}'.";
}
setState(() {
_batteryLevel = batteryLevel;
print(
'>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
<<<<<<<<<<<<<<>$_batteryLevel');
});
}
}