Android长按imageview把图片保存到本地的实例代码

工具类

之前用

AsyncTask

现在改用rxJava

public class SaveImageUtils {
  public static void imageSave(final ImageView imageView, final int id) {
    Observable
        .create(new Observable.OnSubscribe<ImageView>() {
              @Override
              public void call(Subscriber<? super ImageView> sub) {
                sub.onNext(imageView);
              }
            }
        ).subscribeOn(Schedulers.io())
        .observeOn(AndroidSchedulers.mainThread())
        .subscribe(new MySubscriber<ImageView>() {
          @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<T> extends Subscriber<T> {
  @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<Bitmap, Void, String> {
  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

<string name="save_picture">保存图片</string>
<string name="save_picture_failed">保存失败</string>
<string name="save_picture_success">图片成功保存至%s目录</string> 

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;
      }
    }); 

总结

以上所述是小编给大家介绍的Android长按imageview把图片保存到本地的实例代码，希望对大家有所帮助，如果大家有任何疑问请给我留言，小编会及时回复大家的。在此也非常感谢大家对我们网站的支持！