019_03camera的调用

package com.example.day19_03takephotos;

import java.io.File;

import android.app.Activity;
import android.content.Intent;
import android.net.Uri;
import android.os.Bundle;
import android.provider.MediaStore;
import android.view.View;

public class MainActivity extends Activity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
    }
 
    /**
     *  拍照，
     *  方法一：调用系统的camera app来拍照 
     * 我们先要知道camera暴漏给我们的 intent ，通过该intent才可以调器camera 拍照
     *       <intent-filter>
                <action android:name="android.media.action.IMAGE_CAPTURE" />
                <category android:name="android.intent.category.DEFAULT" />
            </intent-filter>
     */
    public void takephoto(View v){
        
        Intent intent = new Intent();
        intent.setAction("android.media.action.IMAGE_CAPTURE");        
        //key point 应该是 你在调用camera进行拍照之前，就应该给他一个路径，告诉他照片保存在哪里
        
        Uri uri = Uri.fromFile(new File("storage/sdcard1/picture1.jpg"));
        intent.putExtra(MediaStore.EXTRA_OUTPUT, uri);
        startActivityForResult(intent, 100); 
        
    }
    
    /**
     * @param v
     * 
     *    <intent-filter>
                <action android:name="android.media.action.VIDEO_CAPTURE" />
                <category android:name="android.intent.category.DEFAULT" />
            </intent-filter>
     */
    public void takevideo(View v){
        Intent intent = new Intent();
        intent.setAction("android.media.action.VIDEO_CAPTURE");
        
        Uri uri = Uri.fromFile(new File("storage/sdcard1/video.mp4"));
        intent.putExtra(MediaStore.EXTRA_OUTPUT, uri);
        startActivityForResult(intent, 200); 
    }
    
    @Override
    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
        // TODO Auto-generated method stub
        super.onActivityResult(requestCode, resultCode, data);
        
        if (requestCode==100&&resultCode==RESULT_OK) {
            System.out.println("MainActivity.onActivityResult()" +"拍照完成，请去处理");
        }
        else if (requestCode==200&&resultCode==RESULT_OK) {
            System.out.println("MainActivity.onActivityResult()" +"录像完成，请去处理");
        }
    }
}

<LinearLayout 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="com.example.day19_03takephotos.MainActivity" 
    android:orientation="vertical">

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="拍照小应用" />
     <Button
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:onClick="takephoto"
        android:text="拍照" />
         <Button
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:onClick="takevideo"
        android:text="录像" />

</LinearLayout>