Android笔记之 图片自由裁剪 DEMO

package com.lin.piccut.demo; import java.io.File; import com.xiaoma.piccut.demo.R; import android.app.Activity; import android.app.AlertDialog; import android.content.DialogInterface; import android.content.Intent; import android.graphics.Bitmap; import android.graphics.drawable.BitmapDrawable; import android.graphics.drawable.Drawable; import android.net.Uri; import android.os.Bundle; import android.os.Environment; import android.provider.MediaStore; import android.view.View; import android.view.View.OnClickListener; import android.widget.Button; import android.widget.ImageButton; import android.widget.ImageView; public class DemoActivity extends Activity implements OnClickListener { private ImageButton ib = null; private ImageView imageView = null; private Button button = null; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); //初始化 initView(); } /** * 初始化界面 */ private void initView() { ib = (ImageButton) findViewById(R.id.imageButton1); imageView = (ImageView) findViewById(R.id.imageView1); button = (Button) findViewById(R.id.button1); ib.setOnClickListener(this); imageView.setOnClickListener(this); button.setOnClickListener(this); } @Override public void onClick(View v) { switch (v.getId()) { case R.id.imageButton1: ShowPickDialog(); break; case R.id.imageView1: ShowPickDialog(); break; case R.id.button1: ShowPickDialog(); break; default: break; } } /** * 选择提示对话框 */ private void ShowPickDialog() { new AlertDialog.Builder(this) .setTitle("获取一个图片") .setNegativeButton("相册", new DialogInterface.OnClickListener() { public void onClick(DialogInterface dialog, int which) { dialog.dismiss(); Intent intent = new Intent(Intent.ACTION_PICK, null); intent.setDataAndType( MediaStore.Images.Media.EXTERNAL_CONTENT_URI, "image/*"); startActivityForResult(intent, 98); } }) .setPositiveButton("拍照", new DialogInterface.OnClickListener() { public void onClick(DialogInterface dialog, int whichButton) { dialog.dismiss(); Intent intent = new Intent( MediaStore.ACTION_IMAGE_CAPTURE); //指定调用相机拍照后的照片存储的路径 intent.putExtra(MediaStore.EXTRA_OUTPUT, Uri .fromFile(new File(Environment .getExternalStorageDirectory(), "test.jpg"))); startActivityForResult(intent, 99); } }).show(); } @Override protected void onActivityResult(int requestCode, int resultCode, Intent data) { switch (requestCode) { //相册 case 98: imageCut(data.getData()); break; //相机 case 99: File temp = new File(Environment.getExternalStorageDirectory() + "/test.jpg"); imageCut(Uri.fromFile(temp)); break; // 取得裁剪后的图片 case 100: if(data != null){ displayImage(data); } break; default: break; } super.onActivityResult(requestCode, resultCode, data); } /** * 裁剪图片方法实现 * @param uri */ public void imageCut(Uri uri) { Intent intent = new Intent("com.android.camera.action.CROP"); intent.setDataAndType(uri, "image/*"); //开启裁剪功能 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", 100); intent.putExtra("outputY", 100); intent.putExtra("return-data", true); startActivityForResult(intent, 100); } /** *显示裁剪后的图片 */ private void displayImage(Intent picdata) { Bundle extras = picdata.getExtras(); if (extras != null) { Bitmap photo = extras.getParcelable("data"); imageView.setImageBitmap(photo); } } }