1 package com.testCarema.android;
2
3 import android.app.Activity;
4 import android.app.AlertDialog;
5 import android.content.ContentResolver;
6 import android.content.DialogInterface;
7 import android.content.Intent;
8 import android.graphics.Bitmap;
9 import android.graphics.BitmapFactory;
10 import android.net.Uri;
11 import android.os.Bundle;
12 import android.view.View;
13 import android.view.View.OnClickListener;
14 import android.widget.ImageView;
15
16 import java.io.ByteArrayOutputStream;
17 import java.io.InputStream;
18
19 public class testCarema extends Activity {
20
21 private ImageView imageView;
22 private OnClickListener imgViewListener;
23 private Bitmap myBitmap;
24 private byte[] mContent;
25
26 @Override
27 public void onCreate(Bundle savedInstanceState) {
28 super.onCreate(savedInstanceState);
29 setContentView(R.layout.main);
30 imageView = (ImageView) findViewById(R.id.imageView);
31 imgViewListener = new OnClickListener() {
32 public void onClick(View v) {
33 final CharSequence[] items = {"相册", "拍照"};
34 AlertDialog dlg = new AlertDialog.Builder(testCarema.this)
35 .setTitle("选择图片")
36 .setItems(items, new DialogInterface.OnClickListener() {
37 public void onClick(DialogInterface dialog, int item) {
38 // 这里item是根据选择的方式，
39 // 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
40 if (item == 1) {
41 Intent getImageByCamera = new Intent(
42 "android.media.action.IMAGE_CAPTURE");
43 startActivityForResult(getImageByCamera, 1);
44 } else {
45 Intent getImage = new Intent(
46 Intent.ACTION_GET_CONTENT);
47 getImage.addCategory(Intent.CATEGORY_OPENABLE);
48 getImage.setType("image/jpeg");
49 startActivityForResult(getImage, 0);
50 }
51 }
52 }).create();
53 dlg.show();
54 }
55 };
56 // 给imageView控件绑定点点击监听器
57 imageView.setOnClickListener(imgViewListener);
58
59 }
60
61 @Override
62 protected void onActivityResult(int requestCode, int resultCode, Intent data) {
63 // TODO Auto-generated method stub
64 super.onActivityResult(requestCode, resultCode, data);
65
66 ContentResolver resolver = getContentResolver();
67 /**
68 * 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，
69 * 所以为了区别到底选择了那个方式获取图片要进行判断，
70 * 这里的requestCode跟startActivityForResult里面第二个参数对应
71 */
72 if (requestCode == 0) {
73 try {
74 // 获得图片的uri
75 Uri originalUri = data.getData();
76 // 将图片内容解析成字节数组
77 mContent = readStream(resolver.openInputStream(Uri
78 .parse(originalUri.toString())));
79 // 将字节数组转换为ImageView可调用的Bitmap对象
80 myBitmap = getPicFromBytes(mContent, null);
81 // //把得到的图片绑定在控件上显示
82 imageView.setImageBitmap(myBitmap);
83 } catch (Exception e) {
84 System.out.println(e.getMessage());
85 }
86
87 } else if (requestCode == 1) {
88 try {
89 super.onActivityResult(requestCode, resultCode, data);
90 Bundle extras = data.getExtras();
91 myBitmap = (Bitmap) extras.get("data");
92 ByteArrayOutputStream baos = new ByteArrayOutputStream();
93 myBitmap.compress(Bitmap.CompressFormat.JPEG, 100, baos);
94 mContent = baos.toByteArray();
95 } catch (Exception e) {
96 // TODO Auto-generated catch block
97 e.printStackTrace();
98 }
99 // 把得到的图片绑定在控件上显示
100 imageView.setImageBitmap(myBitmap);
101 }
102 }
103
104 public static Bitmap getPicFromBytes(byte[] bytes,
105 BitmapFactory.Options opts) {
106 if (bytes != null)
107 if (opts != null)
108 return BitmapFactory.decodeByteArray(bytes, 0, bytes.length,
109 opts);
110 else
111 return BitmapFactory.decodeByteArray(bytes, 0, bytes.length);
112 return null;
113 }
114
115 public static byte[] readStream(InputStream inStream) throws Exception {
116 byte[] buffer = new byte[1024];
117 int len = -1;
118 ByteArrayOutputStream outStream = new ByteArrayOutputStream();
119 while ((len = inStream.read(buffer)) != -1) {
120 outStream.write(buffer, 0, len);
121 }
122 byte[] data = outStream.toByteArray();
123 outStream.close();
124 inStream.close();
125 return data;
126
127 }
128
129 }
