android获取本地图片并显示图片

import java.io.FileNotFoundException;

import android.content.ContentResolver;
import android.content.Intent;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.net.Uri;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.ImageView;

import com.maikefengchao.daixu.R;

public class WriteArticle_CompeterelayActivity extends BaseActivity {
    private ImageView im_upload_img;

    @Override
    public void initView(Bundle savedInstanceState){
        setContentView(R.layout.view_write_competerelay);

        im_upload_img = (ImageView)findViewById(R.id.write_competerelay_cover_iv);
    }

    @Override
    protected void setListener() {
        im_upload_img.setOnClickListener(new OnClickListener() {
            @Override
            public void onClick(View v) {
                Intent intent = new Intent();
                /* 开启Pictures画面Type设定为image */
                intent.setType("image/*");
                /* 使用Intent.ACTION_GET_CONTENT这个Action */
                intent.setAction(Intent.ACTION_GET_CONTENT);
                /* 取得相片后返回本画面 */
                startActivityForResult(intent, 1);
            }
        });
    }

    @Override
    protected void processLogic(Bundle saveInstanceState) {

    }

    //获取本地图片
    @Override
    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
        if (resultCode == RESULT_OK) {
            Uri uri = data.getData();
            String img_url = uri.getPath();//这是本机的图片路径
            ContentResolver cr = this.getContentResolver();
            try {
                Bitmap bitmap = BitmapFactory.decodeStream(cr.openInputStream(uri));
                ImageView imageView = (ImageView) findViewById(R.id.write_competerelay_cover_iv);
                /* 将Bitmap设定到ImageView */
                imageView.setImageBitmap(bitmap);
            } catch (FileNotFoundException e) {
                Log.e("Exception", e.getMessage(),e);
            }
        }
        super.onActivityResult(requestCode, resultCode, data);
    }
}