调用相机，录像机

<?xml version="1.0" encoding="utf-8"?>
<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.lenovo.service.XiangjiActivity"
    android:orientation="vertical">

    <Button
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:onClick="bt_1"
        android:text="相机"/>
    <Button
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:onClick="bt_2"
        android:text="录像机"/>

</LinearLayout>

package com.example.lenovo.service;

import android.content.Intent;
import android.net.Uri;
import android.os.Environment;
import android.provider.MediaStore;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;

import java.io.File;

public class XiangjiActivity extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_xiangji);
    }
    public void bt_1(View v)
    {
        Intent intent=new Intent();
        intent.setAction("android.media.action.IMAGE_CAPTURE");
        intent.addCategory("android.intent.category.DEFAULT");
        File file=new File(Environment.getExternalStorageDirectory()+"/000.jpg");
        Uri uri=Uri.fromFile(file);
        intent.putExtra(MediaStore.EXTRA_OUTPUT,uri);
        this.startActivity(intent);
    }

    public void bt_2(View v)
    {
        Intent intent=new Intent();
        intent.setAction("android.media.action.VIDEO_CAPTURE");
        intent.addCategory("android.intent.category.DEFAULT");
        File file=new File(Environment.getExternalStorageDirectory()+"/000.3gp");
        Uri uri=Uri.fromFile(file);
        intent.putExtra(MediaStore.EXTRA_OUTPUT,uri);
        this.startActivity(intent);
    }

}