Android-ImageView显示选择本地图片或拍照

Android-ImageView显示选择本地图片或拍照

[日期：2012-06-03] 来源：Linux社区 作者：shaojie519 [字体：大 中 小]

http://www.linuxidc.com/Linux/2012-06/61838.htm

最近写项目，遇到了，在此记录一下。Android-ImageView显示选择本地图片或拍照.

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;

17.

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);

29.

30. imageView.setOnClickListener(new OnClickListener() {

31.

32. @Override

33. public void onClick(View v) {

34. // TODO Auto-generated method stub

35. final CharSequence[] items = { "相册", "拍照" };

36.

37. AlertDialog dlg = new AlertDialog.Builder(PicChooserActivity.this).setTitle("选择照片").setItems(items,

38. new DialogInterface.OnClickListener() {

39.

40. @Override

41. public void onClick(DialogInterface dialog, int which) {

42. // TODO Auto-generated method stub

43. //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

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. }

53.

54. }

55. }).create();

56. dlg.show();

57. }

58. });

59.

60. }

61.

62.

63. @Override

64. protected void onActivityResult(int requestCode, int resultCode, Intent data) {

65. // TODO Auto-generated method stub

66. super.onActivityResult(requestCode, resultCode, data);

67.

68. ContentResolver contentResolver =getContentResolver();

69. /**

70. * 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，

71. * 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

72. */

73.

74. if(requestCode==0){

75.

76. //方式一

77. /*try {

78. //获得图片的uri

79. Uri orginalUri = data.getData();

80. //将图片内容解析成字节数组

81. mContent = readStream(contentResolver.openInputStream(Uri.parse(orginalUri.toString())));

82. //将字节数组转换为ImageView可调用的Bitmap对象

83. myBitmap =getPicFromBytes(mContent,null);

84. ////把得到的图片绑定在控件上显示

85. imageView.setImageBitmap(myBitmap);

86. } catch (Exception e) {

87. e.printStackTrace();

88. // TODO: handle exception

89. }*/

90.

91. //方式二

92. try {

93. Uri selectedImage = data.getData();

94. String[] filePathColumn = { MediaStore.Images.Media.DATA };

95.

96. Cursor cursor = getContentResolver().query(selectedImage,

97. filePathColumn, null, null, null);

98. cursor.moveToFirst();

99.

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. }

108.

109.

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. }

123.

124. }

125.

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. }

134.

135.

136.

137. public static byte[] readStream(InputStream in) throws Exception{

138. byte[] buffer =new byte[1024];

139. int len =-1;

140. ByteArrayOutputStream outStream = new ByteArrayOutputStream();

141.

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. }

150.

151.}

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