android--imageview的小技巧

package com.example.imageview01;

import java.io.File;

import android.app.Activity;
import android.net.Uri;
import android.os.Bundle;
import android.os.Environment;
import android.view.Menu;
import android.widget.ImageView;

public class MainActivity extends Activity {

ImageView MyImage = null;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);

MyImage = (ImageView)findViewById(R.id.MyImage);
File file = new File(Environment.getExternalStorageDirectory().getPath()+"/temp.jpg");
MyImage.setImageURI(Uri.fromFile(file));
}

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

}