当屏幕旋转时ImageView的不保留图片 [英] ImageView not retaining Image when Screen rotation occurs

问题描述

import android.app.Activity;
import android.content.Intent;
import android.graphics.Bitmap;
import android.os.Bundle;
import android.os.Parcelable;
import android.util.Log;
import android.view.Menu;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.ImageView;

public class MainActivity extends Activity {

    ImageView iv;
    Bitmap bTemp;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);




        Button cameraClick = (Button) findViewById(R.id.click);
        iv = (ImageView) findViewById(R.id.imageView1);

        final Bitmap data = (Bitmap) getLastNonConfigurationInstance();
        if (data == null) { 

           iv.setImageBitmap(bTemp);
        }


        cameraClick.setOnClickListener(myhandler);

    }


    OnClickListener myhandler = new OnClickListener() {
        public void onClick(View v) {
            Intent intent = new Intent(android.provider.MediaStore.ACTION_IMAGE_CAPTURE);
            startActivityForResult(intent, 0);
        }
      };


    @Override
    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
        super.onActivityResult(requestCode, resultCode, data);
        Bitmap bm = (Bitmap) data.getExtras().get("data");
        iv.setImageBitmap(bm);

    }


    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.main, menu);
        return true;
    }




    @Override
    @Deprecated
    public Object onRetainNonConfigurationInstance() {
        bTemp = iv.getDrawingCache();
        return bTemp;
    }


}

我使用的ImageView来存储它是使用相机拍摄的意图，但是当屏幕旋转图像丢失的图像。 我尝试使用onRetainNonConfigurationInstance（），但它不工作

I'm using a imageview to store the image which is captured using the Camera Intent but when the screen rotates the image is lost. I tried using onRetainNonConfigurationInstance() but its not working

和我不想写的图像å文件。

And i don't want to write the image to afile.

推荐答案

这可以帮助你......

this may help you...

@Override
protected void onSaveInstanceState(Bundle outState) {
    BitmapDrawable drawable = (BitmapDrawable) imageView.getDrawable();
    Bitmap bitmap = drawable.getBitmap();
    outState.putParcelable("image", bitmap);
    super.onSaveInstanceState(outState);
}

protected void onCreate(Bundle savedInstanceState) {
     if(savedInstanceState != null) {
        Bitmap bitmap = savedInstanceState.getParcelable("image");
        imageView.setImageBitmap(bitmap);
     }
}

这篇关于当屏幕旋转时ImageView的不保留图片的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！