最近CSDN无法上传图片，，所以效果图无法给大家了。 首先讲述这个小项目的特色： 1、调用系统的相册应用获取单张图片 2、对单张图片进行剪切方便做成指定大小的头像图片 3、对获取图片的结果进行解析，使用三种方式进行。 下面具体请看代码：
{Button getPic,getPic2Cut;REQUEST = HEAD_IMAGE_ZOOM = 12;//图片剪切的请求值private Uri uri;private String TAG = MainActivity.class.getSimpleName();(Bundle savedInstanceState) {super.onCreate(savedInstanceState);requestWindowFeature(Window.FEATURE_NO_TITLE);setContentView(R.layout.main);init();setclickListener();}(){backTx = (TextView) findViewById(R.id.cancle);sureTx = (TextView) findViewById(R.id.ok);imageView = (ImageView) findViewById(R.id.image);getPic = (Button) findViewById(R.id.get_pic);getPic2Cut = (Button) findViewById(R.id.get_pic_to_cut);}(){backTx.setOnClickListener(this);sureTx.setOnClickListener(this);getPic.setOnClickListener(this);getPic2Cut.setOnClickListener(this);}(){Intent intent = new Intent(Intent.ACTION_GET_CONTENT);intent.setType(“image/*”);startActivityForResult(intent, REQUEST);}() {super.onDestroy();}(View v) {switch (v.getId()) {case R.id.cancle:finish();break;case R.id.ok:Toast.makeText(MainActivity.this, “图片已经获取到”, Toast.LENGTH_SHORT).show();break;case R.id.get_pic:loadData();break;case R.id.get_pic_to_cut:startPhotoZoom(uri);break;}}@SuppressWarnings(“deprecation”)(int requestCode, int resultCode, Intent data) {super.onActivityResult(requestCode, resultCode, data);if (requestCode == REQUEST && resultCode == RESULT_OK) {uri = data.getData();/*** 方法一：* 直接使用ImageView的方法设置图片地址URI即可。* 不过这种方式当图片很大的时候，容易出现OOM异常，慎用！*/imageView.setImageURI(uri);/*** 方法二：* 根据获取的URI进行查询，获取到图片后进行缩放，不会出现OOM异常*/Cursor cursor = managedQuery(uri, null, null, null, null);if (cursor != null) {Log.i(TAG, “记录数=”+cursor.getCount());if (cursor.moveToFirst()) {int index = cursor.getColumnIndexOrThrow(Media.DATA);String path = cursor.getString(index);BitmapFactory.Options options = new BitmapFactory.Options();options.inSampleSize = 2;Bitmap bitmap = BitmapFactory.decodeFile(path, options);imageView.setImageBitmap(bitmap);}}else {Toast.makeText(MainActivity.this, “无法获取图片数据”, Toast.LENGTH_SHORT).show();}/*** 方法三：* 由于managedQuery这个方法已经不再推荐使用* 故使用CursorLoader类完成查询操作*/CursorLoader cursorLoader = new CursorLoader(MainActivity.this,uri, null, null, null, null);Cursor cursor2 = cursorLoader.loadInBackground();if (cursor2 != null) {Log.i(TAG, “记录数=”+cursor2.getCount());if (cursor2.moveToFirst()) {int index = cursor2.getColumnIndexOrThrow(Media.DATA);String path = cursor2.getString(index);BitmapFactory.Options options = new BitmapFactory.Options();options.inSampleSize = 2;Bitmap bitmap = BitmapFactory.decodeFile(path, options);imageView.setImageBitmap(bitmap);}}else {Toast.makeText(MainActivity.this, “无法获取图片数据”, Toast.LENGTH_SHORT).show();}}else if (requestCode == HEAD_IMAGE_ZOOM && resultCode == RESULT_OK) {Bundle bundle = data.getExtras();if (bundle != null) {Bitmap bitmap = bundle.getParcelable(“data”);imageView.setImageBitmap(bitmap);}else {Toast.makeText(MainActivity.this, “图片剪切失败”, Toast.LENGTH_SHORT).show();}}else if (requestCode == HEAD_IMAGE_ZOOM) {Toast.makeText(MainActivity.this, “图片取消剪切”, Toast.LENGTH_SHORT).show();}}/*** 调用系统的程序进行图片的剪切操作* 获取指定大小的剪切图片，方便做成头像* @param uri*/(Uri uri) {Intent intent = new Intent(“com.android.camera.action.CROP”);intent.setDataAndType(uri, “image/*”);// 下面这个crop=true是设置在开启的Intent中设置显示的VIEW可裁剪intent.putExtra(“crop”, “true”);// aspectX aspectY 是宽高的比例intent.putExtra(“aspectX”, 1);intent.putExtra(“aspectY”, 1);// outputX outputY 是裁剪图片宽高intent.putExtra(“outputX”, 80);intent.putExtra(“outputY”, 80);intent.putExtra(“return-data”, true);startActivityForResult(intent, HEAD_IMAGE_ZOOM);}}孤独是为了孤独背后的解脱，孤独的过程，就是一个寻找真爱的过程。
