Android 本地保存图像并在webview中显示
我对这段简单的代码有困难。 我从web下载图像,并将其保存在本地:Android 本地保存图像并在webview中显示,android,webview,save,local,Android,Webview,Save,Local,我对这段简单的代码有困难。 我从web下载图像,并将其保存在本地: File mFile = new File(context.getFilesDir(), "a.png"); if(!mFile.exists()) { mFile.createNewFile(); } FileOutputStream fos = new FileOutputStream(mF
File mFile = new File(context.getFilesDir(), "a.png");
if(!mFile.exists()) { mFile.createNewFile(); }
FileOutputStream fos = new FileOutputStream(mFile);
fos.write(baf.toByteArray());
fos.flush();
fos.close();
我尝试在ImageView上显示此图像,它正在工作。
现在我尝试在网络视图上显示保存图像。
String data = "<body>" +"<img src=\"a.png\"/></body>";
webview.loadDataWithBaseURL(getActivity().getFilesDir().toString(),data , "text/html", "utf-8",null);
String data=“”+”;
loadDataWithBaseURL(getActivity().getFileDir().toString(),数据,“text/html”,“utf-8”,null);
它不工作了,网络视图什么也没显示。我尝试使用png的webview,我把自己放在/assets中,它正在工作
我认为我的语法指向字符串数据中的文件是错误的,但我不确定
谢谢你的帮助
谢谢
Alex.String base=Environment.getExternalStorageDirectory().getAbsolutePath().toString();
String imagePath=“file://“+base+”/a.png”;
字符串html=“”;
WebView.loadDataWithBaseURL(“file:///mnt/sdcard/Your 文件夹/”,html,“text/html”,“utf-8”,““”);
String base=Environment.getExternalStorageDirectory().getAbsolutePath().toString();
String imagePath=“file://“+base+”/a.png”;
字符串html=“”;
WebView.loadDataWithBaseURL(“file:///mnt/sdcard/Your 文件夹/”,html,“text/html”,“utf-8”,““”);
好的,在测试了很多不同的东西之后,我最终得到了这个工作代码
WebView webview = (WebView) view.findViewById(R.id.imageView);
try {
FileInputStream in = getActivity().openFileInput("image_behindfragment.png");
BufferedInputStream buf = new BufferedInputStream(in);
byte[] bitMapA= new byte[buf.available()];
buf.read(bitMapA);
Bitmap bM = BitmapFactory.decodeByteArray(bitMapA, 0, bitMapA.length);
//imageview.setImageBitmap(bM);
if (in != null) {
in.close();
}
if (buf != null) {
buf.close();
String imgToString = Base64.encodeToString(bitMapA,Base64.DEFAULT);
String imgTag = "<img src='data:image/png;base64," + imgToString
+ "' align='left' bgcolor='ff0000'/>";
webview.getSettings().setBuiltInZoomControls(true);
webview.setInitialScale(30);
WebSettings webSettings = webview.getSettings();
webSettings.setUseWideViewPort(true);
webview.loadData(imgTag, "text/html", "utf-8");
}
} catch (Exception e) {
e.printStackTrace();
}
WebView-WebView=(WebView)view.findviewbyd(R.id.imageView);
试一试{
FileInputStream in=getActivity().openFileInput(“image_behindfragment.png”);
BufferedInputStream buf=新的BufferedInputStream(in);
byte[]bitMapA=新字节[buf.available()];
buf.read(位图);
位图bM=BitmapFactory.decodeByteArray(bitMapA,0,bitMapA.length);
//设置图像位图(bM);
if(in!=null){
in.close();
}
如果(buf!=null){
buf.close();
字符串imgToString=Base64.encodeToString(bitMapA,Base64.DEFAULT);
字符串imgTag=“”;
webview.getSettings().setBuilTinZoomControl(true);
webview.setInitialScale(30);
WebSettings WebSettings=webview.getSettings();
webSettings.setUseWideViewPort(true);
loadData(imgTag,“text/html”,“utf-8”);
}
}捕获(例外e){
e、 printStackTrace();
}
好的,在测试了很多不同的东西之后,我最终得到了这个工作代码
WebView webview = (WebView) view.findViewById(R.id.imageView);
try {
FileInputStream in = getActivity().openFileInput("image_behindfragment.png");
BufferedInputStream buf = new BufferedInputStream(in);
byte[] bitMapA= new byte[buf.available()];
buf.read(bitMapA);
Bitmap bM = BitmapFactory.decodeByteArray(bitMapA, 0, bitMapA.length);
//imageview.setImageBitmap(bM);
if (in != null) {
in.close();
}
if (buf != null) {
buf.close();
String imgToString = Base64.encodeToString(bitMapA,Base64.DEFAULT);
String imgTag = "<img src='data:image/png;base64," + imgToString
+ "' align='left' bgcolor='ff0000'/>";
webview.getSettings().setBuiltInZoomControls(true);
webview.setInitialScale(30);
WebSettings webSettings = webview.getSettings();
webSettings.setUseWideViewPort(true);
webview.loadData(imgTag, "text/html", "utf-8");
}
} catch (Exception e) {
e.printStackTrace();
}
WebView-WebView=(WebView)view.findviewbyd(R.id.imageView);
试一试{
FileInputStream in=getActivity().openFileInput(“image_behindfragment.png”);
BufferedInputStream buf=新的BufferedInputStream(in);
byte[]bitMapA=新字节[buf.available()];
buf.read(位图);
位图bM=BitmapFactory.decodeByteArray(bitMapA,0,bitMapA.length);
//设置图像位图(bM);
if(in!=null){
in.close();
}
如果(buf!=null){
buf.close();
字符串imgToString=Base64.encodeToString(bitMapA,Base64.DEFAULT);
字符串imgTag=“”;
webview.getSettings().setBuilTinZoomControl(true);
webview.setInitialScale(30);
WebSettings WebSettings=webview.getSettings();
webSettings.setUseWideViewPort(true);
loadData(imgTag,“text/html”,“utf-8”);
}
}捕获(例外e){
e、 printStackTrace();
}