Android-ImageView顯示選擇本地圖片或拍照

最近寫項目，遇到了，在此記錄一下。Android-ImageView顯示選擇本地圖片或拍照.

1. import java.io.ByteArrayOutputStream;
2. import java.io.InputStream;
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.database.Cursor;
9. import android.graphics.Bitmap;
10. import android.graphics.BitmapFactory;
11. import android.net.Uri;
12. import android.os.Bundle;
13. import android.provider.MediaStore;
14. import android.view.View;
15. import android.view.View.OnClickListener;
16. import android.widget.ImageView;
18. public class PicChooserActivity extends Activity {
19. /** Called when the activity is first created. */
20. private ImageView imageView;
21. private OnClickListener imgViewListener;
22. private Bitmap myBitmap;
23. private byte[] mContent;
24. @Override
25. public void onCreate(Bundle savedInstanceState) {
26. super.onCreate(savedInstanceState);
27. setContentView(R.layout.main);
28. imageView =(ImageView) findViewById(R.id.ivPic);
30. imageView.setOnClickListener(new OnClickListener() {
32. @Override
33. public void onClick(View v) {
34. // TODO Auto-generated method stub
35. final CharSequence[] items = { "相冊", "拍照" };
37. AlertDialog dlg = new AlertDialog.Builder(PicChooserActivity.this).setTitle("選擇照片").setItems(items,
38. new DialogInterface.OnClickListener() {
40. @Override
41. public void onClick(DialogInterface dialog, int which) {
42. // TODO Auto-generated method stub
43. //這裡item是根據選擇的方式， 在items數組裡面定義了兩種方式，拍照的下標為1所以就調用拍照方法
44. if(which==1){
45. Intent getImageByCamera = new Intent("android.media.action.IMAGE_CAPTURE");
46. startActivityForResult(getImageByCamera, 1);
47. }else{
48. Intent getImage = new Intent(Intent.ACTION_GET_CONTENT);
49. getImage.addCategory(Intent.CATEGORY_OPENABLE);
50. getImage.setType("image/jpeg");
51. startActivityForResult(getImage, 0);
52. }
54. }
55. }).create();
56. dlg.show();
57. }
58. });
60. }
63. @Override
64. protected void onActivityResult(int requestCode, int resultCode, Intent data) {
65. // TODO Auto-generated method stub
66. super.onActivityResult(requestCode, resultCode, data);
68. ContentResolver contentResolver =getContentResolver();
69. /**
70. * 因為兩種方式都用到了startActivityForResult方法，這個方法執行完後都會執行onActivityResult方法，
71. * 所以為了區別到底選擇了那個方式獲取圖片要進行判斷，這裡的requestCode跟startActivityForResult裡面第二個參數對應
72. */
74. if(requestCode==0){
76. //方式一
77. /*try {
78. //獲得圖片的uri
79. Uri orginalUri = data.getData();
80. //將圖片內容解析成字節數組
81. mContent = readStream(contentResolver.openInputStream(Uri.parse(orginalUri.toString())));
82. //將字節數組轉換為ImageView可調用的Bitmap對象
83. myBitmap =getPicFromBytes(mContent,null);
84. ////把得到的圖片綁定在控件上顯示
85. imageView.setImageBitmap(myBitmap);
86. } catch (Exception e) {
87. e.printStackTrace();
88. // TODO: handle exception
89. }*/
91. //方式二
92. try {
93. Uri selectedImage = data.getData();
94. String[] filePathColumn = { MediaStore.Images.Media.DATA };
96. Cursor cursor = getContentResolver().query(selectedImage,
97. filePathColumn, null, null, null);
98. cursor.moveToFirst();
100. int columnIndex = cursor.getColumnIndex(filePathColumn[0]);
101. String picturePath = cursor.getString(columnIndex);
102. cursor.close();
103. imageView.setImageBitmap(BitmapFactory.decodeFile(picturePath));
104. } catch (Exception e) {
105. // TODO: handle exception
106. e.printStackTrace();
107. }
110. }else if(requestCode==1){
111. try {
112. Bundle extras = data.getExtras();
113. myBitmap = (Bitmap) extras.get("data");
114. ByteArrayOutputStream baos = new ByteArrayOutputStream();
115. myBitmap.compress(Bitmap.CompressFormat.JPEG , 100, baos);
116. mContent=baos.toByteArray();
117. } catch (Exception e) {
118. e.printStackTrace();
119. // TODO: handle exception
120. }
121. imageView.setImageBitmap(myBitmap);
122. }
124. }
126. public static Bitmap getPicFromBytes(byte[] bytes, BitmapFactory.Options opts) {
127. if (bytes != null)
128. if (opts != null)
129. return BitmapFactory.decodeByteArray(bytes, 0, bytes.length,opts);
130. else
131. return BitmapFactory.decodeByteArray(bytes, 0, bytes.length);
132. return null;
133. }
137. public static byte[] readStream(InputStream in) throws Exception{
138. byte[] buffer =new byte[1024];
139. int len =-1;
140. ByteArrayOutputStream outStream = new ByteArrayOutputStream();
142. while((len=in.read(buffer))!=-1){
143. outStream.write(buffer, 0, len);
144. }
145. byte[] data =outStream.toByteArray();
146. outStream.close();
147. in.close();
148. return data;
149. }
151. }

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