从相册或拍照选择照片到EditText
【方法一】使用自定义AlertDialog
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private static final int PHOTO_SUCCESS = 1;private static final int CAMERA_SUCCESS = 2; private ImageButton pic; //图片选择按钮// 从相册或相机选择图片pic.setOnClickListener(new View.OnClickListener() {@Overridepublic void onClick(View v) {final CharSequence[] items = { "手机相册", "相机拍摄" };AlertDialog dlg = new AlertDialog.Builder(NewTopic.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, CAMERA_SUCCESS); }else{ Intent getImage = new Intent(Intent.ACTION_GET_CONTENT); getImage.addCategory(Intent.CATEGORY_OPENABLE); getImage.setType("image/*"); startActivityForResult(getImage, PHOTO_SUCCESS); } } }).create(); dlg.show(); }});protected void onActivityResult(int requestCode, int resultCode, Intent intent) {ContentResolver resolver = getContentResolver(); if (resultCode == RESULT_OK) {switch (requestCode) {case PHOTO_SUCCESS://获得图片的uri Uri originalUri = intent.getData(); Bitmap bitmap = null;try {Bitmap originalBitmap = BitmapFactory.decodeStream(resolver.openInputStream(originalUri));bitmap = resizeImage(originalBitmap, 200, 200);} catch (FileNotFoundException e) {e.printStackTrace();}if(bitmap != null){//根据Bitmap对象创建ImageSpan对象ImageSpan imageSpan = new ImageSpan(NewTopic.this, bitmap);//创建一个SpannableString对象，以便插入用ImageSpan对象封装的图像SpannableString spannableString = new SpannableString("[local]"+1+"[/local]");// 用ImageSpan对象替换facespannableString.setSpan(imageSpan, 0, "[local]1[local]".length()+1, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);//将选择的图片追加到EditText中光标所在位置int index = edit.getSelectionStart(); //获取光标所在位置Editable edit_text = edit.getEditableText();if(index <0 || index >= edit_text.length()){edit_text.append(spannableString);}else{edit_text.insert(index, spannableString);}}else{Toast.makeText(NewTopic.this, "获取图片失败", Toast.LENGTH_SHORT).show();}break;case CAMERA_SUCCESS:Bundle extras = intent.getExtras(); Bitmap originalBitmap1 = (Bitmap) extras.get("data");if(originalBitmap1 != null){bitmap = resizeImage(originalBitmap1, 200, 200);//根据Bitmap对象创建ImageSpan对象ImageSpan imageSpan = new ImageSpan(NewTopic.this, bitmap);//创建一个SpannableString对象，以便插入用ImageSpan对象封装的图像SpannableString spannableString = new SpannableString("[local]"+1+"[/local]");// 用ImageSpan对象替换facespannableString.setSpan(imageSpan, 0, "[local]1[local]".length()+1, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);//将选择的图片追加到EditText中光标所在位置int index = edit.getSelectionStart(); //获取光标所在位置Editable edit_text = edit.getEditableText();if(index <0 || index >= edit_text.length()){edit_text.append(spannableString);}else{edit_text.insert(index, spannableString);}}else{Toast.makeText(NewTopic.this, "获取图片失败", Toast.LENGTH_SHORT).show();}break;default:break;}}}/** * 图片缩放 * @param originalBitmap 原始的Bitmap * @param newWidth 自定义宽度 * @param newHeight自定义高度 * @return 缩放后的Bitmap */private Bitmap resizeImage(Bitmap originalBitmap, int newWidth, int newHeight){int width = originalBitmap.getWidth();int height = originalBitmap.getHeight();//定义欲转换成的宽、高//int newWidth = 200;//int newHeight = 200;//计算宽、高缩放率float scanleWidth = (float)newWidth/width;float scanleHeight = (float)newHeight/height;//创建操作图片用的matrix对象 MatrixMatrix matrix = new Matrix();// 缩放图片动作matrix.postScale(scanleWidth,scanleHeight);//旋转图片 动作//matrix.postRotate(45);// 创建新的图片BitmapBitmap resizedBitmap = Bitmap.createBitmap(originalBitmap,0,0,width,height,matrix,true);return resizedBitmap;}alertDialog 的运行效果类似这样：
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【方法二】使用Intent.createChooser
?还可以使用Intent选择器+隐式Intent的方法达到效果,只是这种方式比较繁琐，界面效果也差点。
?首先，定义两个Activity来接受隐式intent,?AndroidManifest.xml:
<activity android:name=".activity.action_get_content.PickPicFromLocalFile" android:label="手机相册"> <intent-filter> <action android:name="open_pic_intent" /> <category android:name="android.intent.category.DEFAULT" /> <category android:name="android.intent.category.OPENABLE" /> <data android:mimeType="image/*" /> </intent-filter> </activity> <activity android:name=".activity.action_get_content.PickPicFromCamera" android:label="相机拍摄" android:icon="@drawable/logo1"> <intent-filter> <action android:name="open_pic_intent" /> <category android:name="android.intent.category.DEFAULT" /> <category android:name="android.intent.category.OPENABLE" /> <data android:mimeType="image/*" /> </intent-filter> </activity>?
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?PickPicFromLocalFile.java:
?调用了系统的打开本地图库的方法，把intent传给了我们自定义的页面，自定义页面再把Intent传给事件源页面。
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/** * 手机相册 使用Intent.createChooser弹出的菜单 * @author wangyx * @version 1.0.0 2011-12-16 */public class PickPicFromLocalFile extends Activity {protected static final int PICRESULT_LOCAL = 0;private Intent intent;@Overrideprotected void onCreate(Bundle savedInstanceState) {// TODO Auto-generated method stubsuper.onCreate(savedInstanceState);intent = getIntent();Intent innerIntent = new Intent(Intent.ACTION_GET_CONTENT); //action_get_content是通过intent中设置的type属性来判断具体调用哪个程序的innerIntent.setType("image/*"); startActivityForResult(innerIntent,PICRESULT_LOCAL);}@Override public void onActivityResult(int reqCode, int resultCode, Intent data){super.onActivityResult(reqCode, resultCode, data); if(resultCode == RESULT_OK){ switch (reqCode) { case (PICRESULT_LOCAL): intent.setData(data.getData()); intent.putExtra("flag", 1); //回传用于判断是哪个网页传递的数据 setResult(RESULT_OK, intent); finish(); break; }} }}?PickPicFromCamera.java：调用系统打开相机的方法，照片的数据保存在intent的bundle中，key值为"data"。
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/** * 手机相册 使用Intent.createChooser弹出的菜单 * @author wangyx * @version 1.0.0 2011-12-16 */public class PickPicFromCamera extends Activity {protected static final int PICRESULT_CAMERA = 0;private Intent intent;@Overrideprotected void onCreate(Bundle savedInstanceState) {// TODO Auto-generated method stubsuper.onCreate(savedInstanceState);intent = this.getIntent();Intent getImageByCamera= new Intent("android.media.action.IMAGE_CAPTURE"); startActivityForResult(getImageByCamera, PICRESULT_CAMERA); }@Override public void onActivityResult(int reqCode, int resultCode, Intent data){super.onActivityResult(reqCode, resultCode, data); if(resultCode == RESULT_OK){ switch (reqCode) { case (PICRESULT_CAMERA): Bundle extras = data.getExtras(); intent.putExtra("flag", 2); intent.putExtras(extras); setResult(RESULT_OK, intent); finish(); break; }} }}?处理回传的数据，显示在ImageView上：
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protected static final int PICRESULT_CODE = 0;private ImageButton pic; //图片选择按钮private ImageView iv;// 从相册或相机选择图片pic.setOnClickListener(new View.OnClickListener() {Intent wrapperIntent = new Intent("open_pic_intent"); wrapperIntent.setType("image/*"); startActivityForResult(Intent.createChooser(wrapperIntent, "设置"), PICRESULT_CODE);}@Override public void onActivityResult(int reqCode, int resultCode, Intent data){ ContentResolver resolver = getContentResolver();if(resultCode == RESULT_OK){ switch (reqCode) {case PICRESULT_CODE:Bitmap myBitmap = null;if(data.getIntExtra("flag", 0) == 1){//处理本地图库返回的数据 try { //获得图片的uri Uri originalUri = data.getData(); //将图片内容解析成字节数组 byte[] 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); } catch (Exception e) { System.out.println(e.getMessage()); } }else if(data.getIntExtra("flag", 0) == 2){ try { Bundle extras = data.getExtras(); myBitmap = (Bitmap) extras.get("data"); ByteArrayOutputStream baos = new ByteArrayOutputStream(); myBitmap.compress(Bitmap.CompressFormat.JPEG , 100, baos); } catch (Exception e) { e.printStackTrace(); } } //把得到的图片绑定在控件上显示 iv.setImageBitmap(myBitmap); break;default:break;}} } 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; } ?? ? 这两个自定义页中中你也可以直接处理图片，在回传的Intent中保存流给接收页面处理，这样做的好处是接受页不必知道是哪个页面回传的数据，少了层逻辑判断，直接将流转为BitMap显示即可，但缺点也很明显：
public Intent putExtra (String name, byte[] value)这个方法传递的字节数不能>40KB，如果超出会报 错。
在数返回显示的逻辑中使用了getPicFromBytes和readStream两个自定义方法，这里只是提供了一种方案，你仍然可以使用方法一中的处理方法。
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效果图：
选项前的图标是AndroidManifest.xml中相关Activity的icon属性，默认会调用Activity所在项目的icon，目前还没有解决如何不显示选项之前的图标，希望知道的朋友，不吝赐教，留言告知。