android-显示选择本地图片或拍照

本文主要是介绍android-显示选择本地图片或拍照，希望对大家解决编程问题提供一定的参考价值，需要的开发者们随着小编来一起学习吧！

原文地址 http://blog.csdn.net/shaojie519/article/details/7626962

[java]  view plain copy  

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;
}
}