Android头像选择

简单头像选择

ui设计

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    tools:context=".MainActivity" >

    <ImageView
        android:id="@+id/imageView1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignLeft="@+id/button1"
        android:layout_below="@+id/button1"
        android:layout_marginLeft="33dp"
        android:layout_marginTop="106dp"
        android:src="@drawable/ic_launcher" />

</RelativeLayout>

逻辑实现

package com.example.android_name;


import java.io.FileNotFoundException;
import java.io.IOException;


import android.net.Uri;
import android.os.Bundle;
import android.provider.MediaStore;
import android.app.Activity;
import android.content.ContentResolver;
import android.content.Intent;
import android.graphics.Bitmap;
import android.view.ContextMenu;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.ContextMenu.ContextMenuInfo;
import android.widget.ImageView;


public class MainActivity extends Activity {
private ImageView img=null;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
img=(ImageView)this.findViewById(R.id.imageView1);

        //注册上下文对象
registerForContextMenu(img);
}
   @Override
public void onCreateContextMenu(ContextMenu menu, View v,
ContextMenuInfo menuInfo) {
// TODO Auto-generated method stub
super.onCreateContextMenu(menu, v, menuInfo);
menu.setHeaderTitle("设置头像");
menu.add(0, 1, 0, "相机中");
menu.add(0, 2, 0, "相册中获取");

}
   @Override
public boolean onContextItemSelected(MenuItem item) {
// TODO Auto-generated method stub

int id=item.getItemId();
switch(id){
case 1:
//创建意图
Intent  intent=new Intent(android.provider.MediaStore.ACTION_IMAGE_CAPTURE);
startActivityForResult(intent, 1);
break;
case 2:
Intent abum=new Intent(Intent.ACTION_GET_CONTENT);
//设置类型
abum.setType("image/*");
startActivityForResult(abum, 2);

break;

}


return true;
}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
// TODO Auto-generated method stub
super.onActivityResult(requestCode, resultCode, data);
if(resultCode==RESULT_OK&&requestCode==1){
//从照相机中获取数据
Bundle budll=data.getExtras();
if(budll!=null){
Bitmap bit= (Bitmap)budll.get("data");
img.setImageBitmap(bit);
}
}else if(resultCode==RESULT_OK&&requestCode==2){
try {
Uri u=data.getData();
ContentResolver con=getContentResolver();

Bitmap b=MediaStore.Images.Media.getBitmap(con, u);
img.setImageBitmap(b);
} catch (FileNotFoundException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}


}