Android 获取系统图库和相机照片 裁剪并显示

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package com.example.image;

import android.app.Activity;
import android.content.Intent;
import android.graphics.Bitmap;
import android.os.Bundle;
import android.provider.MediaStore;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.ImageView;

public class MainActivity extends Activity implements OnClickListener {

	private static final int TK_OK = 1; // 图库
	private static final int XJ_OK = 2; // 相机
	private static final int xj_OK_JQ = 3; // 相机拍照之后截取
	private ImageView mImageView;

	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_main);
		mImageView = (ImageView) findViewById(R.id.iv);
		findViewById(R.id.btn_xj).setOnClickListener(this);
		findViewById(R.id.btn_tk).setOnClickListener(this);
	}

	@Override
	protected void onActivityResult(int requestCode, int resultCode, Intent data) {
		super.onActivityResult(requestCode, resultCode, data);
		if (resultCode == RESULT_OK) {
			if (requestCode == TK_OK) {
				Bundle bundle = data.getExtras();
				Bitmap tkPhoto = (Bitmap) bundle.get("data");
				mImageView.setImageBitmap(tkPhoto);
			} else if (requestCode == XJ_OK) {
				final Bitmap xjPhoto = data.getParcelableExtra("data");
				if (xjPhoto != null) {
					doCropPhoto(xjPhoto);
				}
			} else if (requestCode == xj_OK_JQ) {
				Bitmap xjJQPhoto = data.getParcelableExtra("data");
				if (xjJQPhoto != null) {
					mImageView.setImageBitmap(xjJQPhoto);
				}
			}
		}
	}

	protected void doCropPhoto(Bitmap data) {
		Intent intent = getCropImageIntent(data);
		startActivityForResult(intent, xj_OK_JQ);
	}

        /**
	 * 用于拍照之后返回的照片裁剪
	 * @param data
	 * @return
	 */
	public static Intent getCropImageIntent(Bitmap data) {
		Intent intent = new Intent("com.android.camera.action.CROP");
        intent.setType("image/*");
        intent.putExtra("data", data);
        intent.putExtra("crop", "true");
        intent.putExtra("aspectX", 1);
        intent.putExtra("aspectY", 1);
        intent.putExtra("outputX", 128);
        intent.putExtra("outputY", 128);
        intent.putExtra("return-data", true);
        return intent;
	}

	@Override
	public void onClick(View v) {
		if (v.findViewById(R.id.btn_xj) == v) {
			Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
			startActivityForResult(intent, XJ_OK);
		} else if (v.findViewById(R.id.btn_tk) == v) {
			Intent intent = new Intent(Intent.ACTION_GET_CONTENT, null);    //获取系统图库并裁剪
			intent.setType("image/*");
			intent.putExtra("crop", "true");
			intent.putExtra("aspectX", 1);
			intent.putExtra("aspectY", 1);
			intent.putExtra("outputX", 300);
			intent.putExtra("outputY", 300);
			intent.putExtra("scale", true);
			intent.putExtra("return-data", true);
			intent.putExtra("outputFormat",
					Bitmap.CompressFormat.JPEG.toString());
			intent.putExtra("noFaceDetection", true); // no face detection
			startActivityForResult(intent, TK_OK);
		}
	}
}