Android 获取系统自带相机的照片

import android.app.Activity;
import android.content.Intent;
import android.graphics.Bitmap;
import android.graphics.Color;
import android.os.Bundle;
import android.os.Environment;
import android.provider.MediaStore;
import android.view.Gravity;
import android.view.Menu;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.ImageView;
import android.widget.LinearLayout;
import android.widget.LinearLayout.LayoutParams;
import android.widget.TextView;
import android.widget.Toast;

public class MainActivity extends Activity {

	
	private static final int REQUEST_CODE = 1;		//非负
	
	private ImageView iv;
	@Override
	public void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);

		LinearLayout mLinearLayout = new LinearLayout(this);
		mLinearLayout.setBackgroundColor(Color.RED); // 设置背景颜色
		mLinearLayout.setOrientation(LinearLayout.VERTICAL); // 垂直布局

		TextView tv = new TextView(this);
		tv.setText("哈哈，原来可以不用XML啊,点下那个按钮吧，帅哥");

		Button mButton = new Button(this);
		mButton.setText("另外一个世界");
		mButton.setGravity(Gravity.CENTER);
		
	    iv = new ImageView(this);
		
		mButton.setOnClickListener(new OnClickListener() {
			
			public void onClick(View v) {
				Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
				startActivityForResult(intent, REQUEST_CODE);
			}
		});
		
		LinearLayout.LayoutParams params = new LinearLayout.LayoutParams(
				LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT);

		mLinearLayout.addView(tv, params);

		mLinearLayout.addView(mButton,params);
		
		mLinearLayout.addView(iv,params);
		
		setContentView(mLinearLayout);
	}

	
	/* (non-Javadoc)
	 * @see android.app.Activity#onActivityResult(int, int, android.content.Intent)
	 */
	@Override
	protected void onActivityResult(int requestCode, int resultCode, Intent data) {
		if(data != null && data.getExtras() != null) {
		Bitmap bitMap = (Bitmap)data.getExtras().get("data");
		iv.setImageBitmap(bitMap);
		
		Toast.makeText(this, "bmp.height:" + bitMap.getHeight() + ",bmp.width:" + bitMap.getWidth(), Toast.LENGTH_LONG).show();
		Toast.makeText(this, "requestCode:" + requestCode + ",resultCode" + resultCode, Toast.LENGTH_LONG).show();
		}
		super.onActivityResult(requestCode, resultCode, data);
	}


	@Override
	public boolean onCreateOptionsMenu(Menu menu) {
		getMenuInflater().inflate(R.menu.activity_main, menu);
		return true;
	}

}