Android-ImageView显示选择本地图片或拍照

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.

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.database.Cursor;

import android.graphics.Bitmap;

import android.graphics.BitmapFactory;

import android.net.Uri;

import android.os.Bundle;

import android.provider.MediaStore;

import android.view.View;

import android.view.View.OnClickListener;

import android.widget.ImageView;

public class PicChooserActivity 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.ivPic);

imageView.setOnClickListener(new OnClickListener() {

@Override

public void onClick(View v) {

// TODO Auto-generated method stub

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

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

new DialogInterface.OnClickListener() {

@Override

public void onClick(DialogInterface dialog, int which) {

// TODO Auto-generated method stub

//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(which==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();

}

});

}

@Override

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

// TODO Auto-generated method stub

super.onActivityResult(requestCode, resultCode, data);

ContentResolver contentResolver =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){

//方式一

/*try {

//获得图片的uri

Uri orginalUri = data.getData();

//将图片内容解析成字节数组

mContent = readStream(contentResolver.openInputStream(Uri.parse(orginalUri.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) {

e.printStackTrace();

// TODO: handle exception

}*/

//方式二

try {

Uri selectedImage = data.getData();

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

Cursor cursor = getContentResolver().query(selectedImage,

filePathColumn, null, null, null);

cursor.moveToFirst();

int columnIndex = cursor.getColumnIndex(filePathColumn[0]);

String picturePath = cursor.getString(columnIndex);

cursor.close();

imageView.setImageBitmap(BitmapFactory.decodeFile(picturePath));

} catch (Exception e) {

// TODO: handle exception

e.printStackTrace();

}

}else if(requestCode==1){

try {

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) {

e.printStackTrace();

// TODO: handle exception

}

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 in) throws Exception{

byte[] buffer =new byte[1024];

int len =-1;

ByteArrayOutputStream outStream = new ByteArrayOutputStream();

while((len=in.read(buffer))!=-1){

outStream.write(buffer, 0, len);

}

byte[] data =outStream.toByteArray();

outStream.close();

in.close();

return data;

}

}