在前面的一篇文章中曾介绍过简单的开启相机照相功能，详见 Android简单调用相机Camera功能，实现打开照相功能 ，这一次就会将前面拍摄的照片显示到ImageView中，形成一个完整的效果

看实例

MainActivity.java

package com.example.camera;

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.provider.MediaStore;

import android.util.Log;

import android.view.View;

import android.view.View.OnClickListener;

import android.widget.Button;

import android.widget.ImageView;

public class MainActivity extends Activity {

/** Called when the activity is first created. */

String SD_CARD_TEMP_DIR;

Bitmap myBitmap;

private ImageView imageView;

@Override

public void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_main);

//

SD_CARD_TEMP_DIR = Environment.getExternalStorageDirectory()

+ File.separator + "tmp.jpg";//设定照相后保存的文件名称，相似于缓存文件

imageView = (ImageView)findViewById(R.id.imageView1);

Button btn = (Button) findViewById(R.id.button1);

btn.setOnClickListener(new OnClickListener() {

@Override

public void onClick(View arg0) {

// TODO Auto-generated method stub

Intent cameraIntent = new Intent(

MediaStore.ACTION_IMAGE_CAPTURE);

cameraIntent.putExtra(android.provider.MediaStore.EXTRA_OUTPUT,

Uri.fromFile(new File(SD_CARD_TEMP_DIR)));

startActivityForResult(cameraIntent, 0);

}

});

}

@Override

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

// TODO Auto-generated method stub

super.onActivityResult(requestCode, resultCode, data);

if(requestCode == 0){

Log.d("requestCode", "Need 0");

if(resultCode == RESULT_OK){

Log.d("resultCode", "OK!!!" + SD_CARD_TEMP_DIR);

myBitmap = BitmapFactory.decodeFile(SD_CARD_TEMP_DIR);

imageView.setImageBitmap(myBitmap);

}else{

Log.d("resultCode", "" + resultCode);

}

}else{

Log.d("requestCode", "Not Need");

}

}

}

看一下  activity_main.xml

<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/button1"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:layout_alignParentBottom="true"

android:layout_alignParentRight="true"

android:text="Button" />

<ImageView

android:id="@+id/imageView1"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:layout_above="@+id/button1"

android:layout_alignParentLeft="true"

android:layout_alignParentRight="true"

android:layout_alignParentTop="true"

android:src="@drawable/ic_launcher" />

</RelativeLayout>

最好，再配置一下权限吧。看AndroidMainFest.xml

<?xml version="1.0" encoding="utf-8"?>

<manifest xmlns:android="http://schemas.android.com/apk/res/android"

package="com.example.camera"

android:versionCode="1"

android:versionName="1.0" >

<uses-permission android:name="android.permission.CAMERA" />

<uses-feature android:name="android.hardware.camera" />

<uses-feature android:name="android.hardware.camera.autofocus" />

<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" >

</uses-permission>

<uses-sdk

android:minSdkVersion="8"

android:targetSdkVersion="16" />

<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />

<application

android:allowBackup="true"

android:hardwareAccelerated="false"

android:icon="@drawable/ic_launcher"

android:label="@string/app_name"

android:theme="@style/AppTheme" >

<activity

android:name="com.example.camera.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>

</manifest>

这个地方，还要注意的是  android:hardwareAccelerated="false"  这一句，假设我们不加这一句的情况下。会非常easy出现下面问题

Bitmap too large to be uploaded into a texture

因此。我们须要将硬件加速功能关闭。