android系统如何调用自带的相机相册

android系统如何调用系统自带的相册和相机简单的代码：

1)第一种调用的方法相关代码：

<strong><span style="font-size:18px;">import java.io.IOException;import com.example.photo.R;import com.example.photo.ui.utils.PhotoUtils;import android.net.Uri;import android.os.Bundle;import android.provider.MediaStore;import android.text.TextUtils;import android.view.View;import android.view.View.OnClickListener;import android.widget.Button;import android.widget.ImageView;import android.app.Activity;import android.app.AlertDialog;import android.content.DialogInterface;import android.content.Intent;import android.graphics.Bitmap;public class MainActivity extends Activity implements OnClickListener{private Button bt_select;private ImageView iv_select_images;@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_main);iv_select_images = (ImageView) findViewById(R.id.iv_select_images);bt_select = (Button) findViewById(R.id.bt_select);bt_select.setOnClickListener(this);}@Overridepublic void onClick(View v) {//选择的itemfinal CharSequence[] items = {"相册","拍照"};AlertDialog dlg = new AlertDialog.Builder(MainActivity.this).setTitle("选择照片").setItems(items, new DialogInterface.OnClickListener() {@Overridepublic void onClick(DialogInterface dialog, int which) {//这里item是根据选择的方式，在item数组里边定义了两种方式，拍照的下标为1所以就调用拍照的方法if(which==1){//调用android自带的照相机Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);//Uri photoUri = MediaStore.Images.Media.EXTERNAL_CONTENT_URI;startActivityForResult(intent, 1);}else{//调用android的图库  两种方法都可以  //第一种//Intent i = new Intent(Intent.ACTION_PICK,android.provider.MediaStore.Images.Media.EXTERNAL_CONTENT_URI);//startActivityForResult(i, 2);//第二种Intent i = new Intent(Intent.ACTION_GET_CONTENT);i.addCategory(Intent.CATEGORY_OPENABLE);i.setType("image/*");startActivityForResult(i, 2);}}}).create();dlg.show();}/** * 图片选取的相关代码 */@Overrideprotected void onActivityResult(int requestCode, int resultCode, Intent data) {super.onActivityResult(requestCode, resultCode, data);//完成照相后回调用此方法//判断是否成功if(resultCode==MainActivity.RESULT_OK){//调用读取手机内存图片if(requestCode==2){Uri address = data.getData();if(!TextUtils.isEmpty(address.toString())){iv_select_images.setImageURI(address);}else{//用BitmapFactory去加载拍照前指定的路径位置的图片Bitmap bitmap;try {bitmap = PhotoUtils.revitionImageSize(address.toString());iv_select_images.setImageBitmap(bitmap);} catch (IOException e) {e.printStackTrace();}}}else if(requestCode==1){//调用本地相机拍照Bundle bundle = data.getExtras();//获取相机返回的数据，并转换成bitmap的图片格式Bitmap photo = bundle.getParcelable("data");iv_select_images.setImageBitmap(photo);}}}}</span></strong>

布局文件：

<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"
    tools:context=".MainActivity" >


    <Button
        android:id="@+id/bt_select"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentTop="true"
        android:layout_centerHorizontal="true"
        android:background="#7Ab900"
        android:text="打开" />


    <ImageView
        android:id="@+id/iv_select_images"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_centerHorizontal="true"
        android:layout_centerVertical="true"
        android:src="@drawable/ic_launcher" />

</RelativeLayout>

2）第二种方法

package com.example.photo.ui;


import java.io.IOException;


import com.example.photo.R;
import com.example.photo.ui.utils.PhotoUtils;


import android.app.Activity;
import android.content.Intent;
import android.graphics.Bitmap;
import android.net.Uri;
import android.os.Bundle;
import android.text.TextUtils;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.ImageView;


public class SecondActivity  extends Activity{


private Button bt_select1,bt_select2;
private ImageView iv_select_images1;
@Override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_second);
//初始化布局
setupView();
//设置点击事件
setupClick();
}
private void setupView() {
bt_select1 = (Button) findViewById(R.id.bt_select1);
bt_select2 = (Button) findViewById(R.id.bt_select2);
iv_select_images1 = (ImageView) findViewById(R.id.iv_select_images1);
}
private void setupClick() {
bt_select1.setOnClickListener(new OnClickListener() {

@Override
public void onClick(View v) {
//调用android自带的相机
Intent intent = new Intent(android.provider.MediaStore.ACTION_IMAGE_CAPTURE);
intent.addCategory(Intent.CATEGORY_DEFAULT);
startActivityForResult(intent, 1);
}
});

bt_select2.setOnClickListener(new OnClickListener() {

@Override
public void onClick(View v) {
Intent i = new Intent(Intent.ACTION_GET_CONTENT);
i.addCategory(Intent.CATEGORY_OPENABLE);
i.setType("image/*");
startActivityForResult(i, 2);
}
});
}
/**
* 图片选取的相关代码
*/
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
//完成照相后回调用此方法
//判断是否成功
if(resultCode==SecondActivity.RESULT_OK){
//调用读取手机内存图片
if(requestCode==2){
Uri address = data.getData();
if(!TextUtils.isEmpty(address.toString())){
iv_select_images1.setImageURI(address);
}else{
//用BitmapFactory去加载拍照前指定的路径位置的图片
Bitmap bitmap;
try {
bitmap = PhotoUtils.revitionImageSize(address.toString());
iv_select_images1.setImageBitmap(bitmap);
} catch (IOException e) {
e.printStackTrace();
}
}
}else if(requestCode==1){
//调用本地相机拍照
Bundle bundle = data.getExtras();
//获取相机返回的数据，并转换成bitmap的图片格式
Bitmap photo = bundle.getParcelable("data");
iv_select_images1.setImageBitmap(photo);
}
}
}
}

布局文件：

<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"
    tools:context=".MainActivity" >


    <Button
        android:id="@+id/bt_select1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentTop="true"
        android:layout_centerHorizontal="true"
        android:background="#7Ab900"
        android:text="打开" />


    <ImageView
        android:id="@+id/iv_select_images1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_centerHorizontal="true"
        android:layout_centerVertical="true"
        android:src="@drawable/ic_launcher" />


    <Button
        android:id="@+id/bt_select2"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentTop="true"
        android:layout_toLeftOf="@+id/iv_select_images1"
        android:background="#7Ab900"
        android:text="相册" />


</RelativeLayout>