package com.example;

import java.io.File;

import android.app.Activity;

import android.content.Intent;

import android.graphics.Bitmap;

import android.graphics.BitmapFactory;

import android.net.Uri;

import android.os.Bundle;

import android.os.Environment;

import android.view.Display;

import android.view.View;

import android.view.View.OnClickListener;

import android.widget.Button;

import android.widget.ImageView;

public class MainActivity extends Activity {

	final static int CAMERA_RESULT = 0;

	ImageView imv;

	Button but;

	@Override

	protected void onCreate(Bundle savedInstanceState) {

		super.onCreate(savedInstanceState);

		setContentView(R.layout.fragment_main);

		findViewById();

		but.setOnClickListener(new OnClickListener() {

			public void onClick(View v) {

                               /*运行Camera内置摄像头意图*/

				Intent i = new Intent(

						android.provider.MediaStore.ACTION_IMAGE_CAPTURE);

				startActivityForResult(i, CAMERA_RESULT);

			}

		});

	}

	private void findViewById() {

		but = (Button) findViewById(R.id.but);

		imv = (ImageView) findViewById(R.id.img);

	}

        /* 当activity运行完后，就显示照片*/

	@Override

	protected void onActivityResult(int requestCode, int resultCode, Intent data) {

		super.onActivityResult(requestCode, resultCode, data);

		if (resultCode == RESULT_OK) {

			Bundle bundle = data.getExtras();

			Bitmap bmp = (Bitmap) bundle.get("data");

			imv.setImageBitmap(bmp);

		}

	}

}

AndroidManifest.xml 配置

<application

        android:allowBackup="true"

        android:icon="@drawable/ic_launcher"

        android:label="@string/app_name"

        android:theme="@style/AppTheme" >

        <activity

            android:name="com.example.MainActivity"

            android:label="@string/app_name" >

            <intent-filter>

                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />

            </intent-filter>

        </activity>

    </application>

activity_main.xml 配置

<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" >

     <ImageView

         android:id="@+id/img"

         android:layout_width="wrap_content"

         android:layout_height="wrap_content"

         android:layout_alignParentTop="true"

         android:layout_centerInParent="true"

         />

     <Button

         android:id="@+id/but"

         android:layout_width="wrap_content"

         android:layout_height="wrap_content"

         android:layout_below="@id/img"

         android:layout_centerInParent="true"

         android:text="take_a_picture"/>

</RelativeLayout>