Android 调用系统相册和系统照相机功能雨实例源码.zip

package com.testCarema.android; import java.io.ByteArrayOutputStream; import java.io.InputStream; import android.app.Activity; import android.app.AlertDialog; import android.content.ContentResolver; import android.content.DialogInterface; import android.content.Intent; import android.graphics.Bitmap; import android.graphics.BitmapFactory; import android.net.Uri; import android.os.Bundle; import android.view.View; import android.view.View.OnClickListener; import android.widget.ImageView; public class testCarema extends Activity { /** Called when the activity is first created. */ private ImageView imageView; private OnClickListener imgViewListener; private Bitmap myBitmap; private byte[] mContent; @ Override public void onCreate ( Bundle savedInstanceState ) { super.onCreate(savedInstanceState); setContentView(R.layout.main); imageView = (ImageView) findViewById(R.id.imageView); imgViewListener = new OnClickListener() { public void onClick ( View v ) { final CharSequence[] items = { "相册", "拍照" }; AlertDialog dlg = new AlertDialog.Builder(testCarema.this).setTitle("选择图片").setItems(items, new DialogInterface.OnClickListener() { public void onClick ( DialogInterface dialog , int item ) { // 这里item是根据选择的方式， // 在items数组里面定义了两种方式，拍照的下标为1所以就调用拍照方法 if (item == 1) { Intent getImageByCamera = new Intent("android.media.action.IMAGE_CAPTURE"); startActivityForResult(getImageByCamera, 1); } else { Intent getImage = new Intent(Intent.ACTION_GET_CONTENT); getImage.addCategory(Intent.CATEGORY_OPENABLE); getImage.setType("image/jpeg"); startActivityForResult(getImage, 0); } } }).create(); dlg.show(); } }; // 给imageView控件绑定点点击监听器 imageView.setOnClickListener(imgViewListener); } @ Override protected void onActivityResult ( int requestCode , int resultCode , Intent data ) { // TODO Auto-generated method stub super.onActivityResult(requestCode, resultCode, data); ContentResolver resolver = getContentResolver(); /** * 因为两种方式都用到了startActivityForResult方法， * 这个方法执行完后都会执行onActivityResult方法， 所以为了区别到底选择了那个方式获取图片要进行判断， * 这里的requestCode跟startActivityForResult里面第二个参数对应 */ if (requestCode == 0) { try { // 获得图片的uri Uri originalUri = data.getData(); // 将图片内容解析成字节数组 mContent = readStream(resolver.openInputStream(Uri.parse(originalUri.toString()))); // 将字节数组转换为ImageView可调用的Bitmap对象 myBitmap = getPicFromBytes(mContent, null); // //把得到的图片绑定在控件上显示 imageView.setImageBitmap(myBitmap); } catch ( Exception e ) { System.out.println(e.getMessage()); } } else if (requestCode == 1) { try { super.onActivityResult(requestCode, resultCode, data); Bundle extras = data.getExtras(); myBitmap = (Bitmap) extras.get("data"); ByteArrayOutputStream baos = new ByteArrayOutputStream(); myBitmap.compress(Bitmap.CompressFormat.JPEG, 100, baos); mContent = baos.toByteArray(); } catch ( Exception e ) { // TODO Auto-generated catch block e.printStackTrace(); } // 把得到的图片绑定在控件上显示 imageView.setImageBitmap(myBitmap); } } public static Bitmap getPicFromBytes ( byte[] bytes , BitmapFactory.Options opts ) { if (bytes != null) if (opts != null) return BitmapFactory.decodeByteArray(bytes, 0, bytes.length, opts); else return BitmapFactory.decodeByteArray(bytes, 0, bytes.length); return null; } public static byte[] readStream ( InputStream inStream ) throws Exception { byte[] buffer = new byte[1024]; int len = -1; ByteArrayOutputStream outStream = new ByteArrayOutputStream(); while ((len = inStream.read(buffer)) != -1) { outStream.write(buffer, 0, len); } byte[] data = outStream.toByteArray(); outStream.close(); inStream.close(); return data; } }