问题描述
我正在尝试构建一个应用程序,该应用程序可显示内部存储中的 .txt 文件、.png 文件和 .aac 文件,例如聊天屏幕。首先显示大量图像对我来说是一团糟。我可以通过对图像使用 cacheWidth 和 cacheHeight 来减少内存压力。但是我意识到在使用 release apk 时,Ram 内存使用量随着时间的推移而增加,直到接近 1GB,而且使用量很大。希望得到您的帮助以减少此问题。导航到另一个页面时尝试删除缓存目录是否发生缓存问题。
Future<void> _deleteCacheDir() async {
final cacheDir = await getTemporaryDirectory();
if (cacheDir.existsSync()) {
cacheDir.deleteSync(recursive: true);
}
}
Expanded(
child: SingleChildScrollView(
reverse: true,child: new Column(
mainAxisAlignment: MainAxisAlignment.spaceAround,children: <Widget>[
ListView.separated (
shrinkWrap: true,physics: NeverScrollableScrollPhysics(),itemCount: fileList.length,separatorBuilder: (context,i) {
我如何在列表视图中显示图像;
return Slidable(
actionPane: SlidableDrawerActionPane(),direction: Axis.horizontal,actionExtentRatio: 0.25,child: Column (
crossAxisAlignment: CrossAxisAlignment.start,children: [
Padding(
padding: const EdgeInsets.fromLTRB(8,3,3),child: Container(
child: GestureDetector(
onTap: (){
if (_currentStatus == RecordingStatus.Recording || _currentStatus == RecordingStatus.Paused )
{
_currentStatus = RecordingStatus.Stopped;
_recording.stop();
}
audplayer.dispose();
_deleteCacheDir();
Navigator.push(
context,MaterialPageRoute(
builder: (context) => showRecorderPhoto(pathtxt: widget.pathtxt,pathpng: imgpth,hangisayfa: widget.hangisayfa,),));
},child: Card(
//semanticContainer: true,clipBehavior: Clip.antiAliasWithSaveLayer,shape: RoundedRectangleBorder(
borderRadius: BorderRadius.circular(15.0),elevation: 5,margin: EdgeInsets.all(1),child:
// Image showing lines
Image.file(file,fit: BoxFit.fill,width: screenWidth/2.3,height: screenHeight/2.3,cacheWidth: width2.toInt(),cacheHeight: height2.toInt(),filterQuality: FilterQuality.high,)
),)
]
),secondaryActions: <Widget>[
new IconSlideAction(
caption: '',color: color,icon: Icons.share,onTap: (){
//Share.share(imgpth);
Share.shareFiles([imgpth],text: '.',subject: "Fil");
},new IconSlideAction(
caption: 'Delete',icon: Icons.delete,onTap: (){
fileList.remove(fileList[i]);
final dir = io.Directory(imgpth);
dir.deleteSync(recursive:true);
listYazar();
},],);
child: Padding(
padding: const EdgeInsets.only(left:8,right:8,bottom:3,top:3 ),child: Row(
children: [
Flexible(
child: ConstrainedBox(
constraints: new BoxConstraints(minHeight: 20,minWidth: 10),child: DecoratedBox(
decoration: Boxdecoration(
borderRadius: BorderRadius.circular(10),color: Colors.white,child: Padding(
padding: const EdgeInsets.all(15),child:
txtList[x].toString().contains("b") ? Text(notList[x],style: TextStyle(
fontWeight: FontWeight.bold,fontFamily: "Gothic",color: Colors.blue),)
: Text(notList[x],style: TextStyle(fontFamily: "Gothic",)),
请大家帮帮忙!!
解决方法
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