Android中怎么利用imageview将图片保存到本地，针对这个问题，这篇文章详细介绍了相对应的分析和解答，希望可以帮助更多想解决这个问题的小伙伴找到更简单易行的方法。
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rxJava
public class SaveImageUtils {
public static void imageSave(final ImageView imageView, final int id) {
Observable
.create(new Observable.OnSubscribe() {
@Override
public void call(Subscriber sub) {
sub.onNext(imageView);
}
}
).subscribeOn(Schedulers.io())
.observeOn(AndroidSchedulers.mainThread())
.subscribe(new MySubscriber() {
@Override
public void onNext(ImageView imageView) {
File imageFile = new File(ActivityUtils.ImagePath(), id + ".jpg");
FileOutputStream outStream = null;
try {
outStream = new FileOutputStream(imageFile);
Bitmap image = imageView.getDrawingCache();
image.compress(Bitmap.CompressFormat.JPEG, 100, outStream);
outStream.flush();
outStream.close();
Toast.makeText(UIUtils.getContext(), UIUtils.getString(R.string.save_picture_success), Toast.LENGTH_LONG).show();
} catch (IOException e) {
e.printStackTrace();
onError(e);
}
}
@Override
public void onError(Throwable e) {
Toast.makeText(UIUtils.getContext(), UIUtils.getString(R.string.save_picture_failed), Toast.LENGTH_LONG).show();
}
});
}
}MySubscriber
public class MySubscriber extends Subscriber {
@Override
public void onStart() {
super.onStart();
}
@Override
public void onCompleted() {
}
@Override
public void onError(Throwable e) {
}
@Override
public void onNext(T t) {
}
}
//不建议使用了
package com.app.mly.utils;
import android.app.Activity;
import android.graphics.Bitmap;
import android.os.AsyncTask;
import android.os.Environment;
import android.widget.ImageView;
import android.widget.Toast;
import com.fengche.android.mly.R;
import java.io.File;
import java.io.FileOutputStream;
/**
* Created by y on 2016/1/14.
*/
public class SaveImageUtils extends AsyncTask {
Activity mActivity;
ImageView mImageView;
public SaveImageUtils(Activity activity, ImageView imageView) {
this.mImageView = imageView;
this.mActivity = activity;
}
@Override
protected String doInBackground(Bitmap... params) {
String result = mActivity.getResources().getString(R.string.save_picture_failed);
try {
String sdcard = Environment.getExternalStorageDirectory().toString();
File file = new File(sdcard + "/123");
if (!file.exists()) {
file.mkdirs();
}
File imageFile = new File(file.getAbsolutePath(), "命名" + ".jpg");
FileOutputStream outStream = null;
outStream = new FileOutputStream(imageFile);
Bitmap image = params[0];
image.compress(Bitmap.CompressFormat.JPEG, 100, outStream);
outStream.flush();
outStream.close();
result = mActivity.getResources().getString(R.string.save_picture_success, file.getAbsolutePath());
} catch (Exception e) {
e.printStackTrace();
}
return result;
}
@Override
protected void onPostExecute(String result) {
Toast.makeText(mActivity, result, Toast.LENGTH_SHORT).show();
mImageView.setDrawingCacheEnabled(false);
}
}
stirng文件下需要的几个toast
保存图片
保存失败
图片成功保存至%s目录
代码中引用
mScanCode.setOnLongClickListener(new View.OnLongClickListener() {
@Override
public boolean onLongClick(View v) {
AlertDialog.Builder builder = new AlertDialog.Builder(ShareActivity.this);
builder.setItems(new String[]{getResources().getString(R.string.save_picture)}, new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
mScanCode.setDrawingCacheEnabled(true);
Bitmap imageBitmap = mScanCode.getDrawingCache();
if (imageBitmap != null) {
new SaveImageUtils(ShareActivity.this, mScanCode).execute(imageBitmap);
}
}
});
builder.show();
return true;
}
});关于Android中怎么利用imageview将图片保存到本地问题的解答就分享到这里了，希望以上内容可以对大家有一定的帮助，如果你还有很多疑惑没有解开，可以关注创新互联行业资讯频道了解更多相关知识。
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