Android打开系统相机并拍照的2种显示方法

<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/btnOpenCamera"  android:layout_width="match_parent"  android:layout_height="wrap_content"  android:layout_marginTop="10dp"  android:text="拍照立即显示" /> <Button  android:id="@+id/btnSavePhoto"  android:layout_width="match_parent"  android:layout_height="wrap_content"  android:layout_marginTop="60dp"  android:text="拍照存储后显示" />  <ImageView  android:id="@+id/ivShowPicture"  android:layout_width="match_parent"  android:layout_height="match_parent"  android:layout_centerHorizontal="true"  android:layout_marginTop="130dp" /></RelativeLayout>

package com.example.camera; import java.io.File;import java.io.FileInputStream;import java.io.FileNotFoundException;import java.io.IOException;import java.net.URI; import android.net.Uri;import android.os.Bundle;import android.os.Environment;import android.provider.MediaStore;import android.app.Activity;import android.content.Intent;import android.graphics.Bitmap;import android.graphics.BitmapFactory;import android.view.View;import android.view.View.OnClickListener;import android.widget.Button;import android.widget.ImageView; public class MainActivity extends Activity implements OnClickListener {  private Button btnOpenCamera, btnSavePhoto; private ImageView ivShowPicture; private static int REQUEST_CAMERA_1 = 1; private static int REQUEST_CAMERA_2 = 2; private String mFilePath;  @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main);  // 初始化控件 init();  // 控件绑定点击事件 bindClick(); }  // 初始化控件和变量 private void init() { btnOpenCamera = (Button) findViewById(R.id.btnOpenCamera); btnSavePhoto = (Button) findViewById(R.id.btnSavePhoto); ivShowPicture = (ImageView) findViewById(R.id.ivShowPicture); mFilePath = Environment.getExternalStorageDirectory().getPath();// 获取SD卡路径 mFilePath = mFilePath + "/" + "temp.png";// 指定路径 }  // 控件绑定点击事件 private void bindClick() { btnOpenCamera.setOnClickListener(this); btnSavePhoto.setOnClickListener(this); }  @Override public void onClick(View view) { switch (view.getId()) { case R.id.btnOpenCamera: // 拍照并显示图片 openCamera_1(); break; case R.id.btnSavePhoto: // 拍照后存储并显示图片 openCamera_2(); break; default: break; } }  // 拍照并显示图片 private void openCamera_1() { Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);// 启动系统相机 startActivityForResult(intent, REQUEST_CAMERA_1); }  // 拍照后存储并显示图片 private void openCamera_2() { Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);// 启动系统相机 Uri photoUri = Uri.fromFile(new File(mFilePath)); // 传递路径 intent.putExtra(MediaStore.EXTRA_OUTPUT, photoUri);// 更改系统默认存储路径 startActivityForResult(intent, REQUEST_CAMERA_2); }  @Override protected void onActivityResult(int requestCode, int resultCode, Intent data) { super.onActivityResult(requestCode, resultCode, data); if (resultCode == RESULT_OK) { // 如果返回数据 if (requestCode == REQUEST_CAMERA_1) { // 判断请求码是否为REQUEST_CAMERA,如果是代表是这个页面传过去的，需要进行获取 Bundle bundle = data.getExtras(); // 从data中取出传递回来缩略图的信息，图片质量差，适合传递小图片 Bitmap bitmap = (Bitmap) bundle.get("data"); // 将data中的信息流解析为Bitmap类型 ivShowPicture.setImageBitmap(bitmap);// 显示图片 } else if (requestCode == REQUEST_CAMERA_2) { FileInputStream fis = null; try {  fis = new FileInputStream(mFilePath); // 根据路径获取数据  Bitmap bitmap = BitmapFactory.decodeStream(fis);  ivShowPicture.setImageBitmap(bitmap);// 显示图片 } catch (FileNotFoundException e) {  e.printStackTrace(); } finally {  try {  fis.close();// 关闭流  } catch (IOException e) {  e.printStackTrace();  } } } } }}

<?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-sdk  android:minSdkVersion="17"  android:targetSdkVersion="19" />  <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />  <application  android:allowBackup="true"  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>   <!-- 注册相机功能，在别的程序Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);进行启动相机时也会选择是否启动该应用 -->   <intent-filter>    <action android:name="android.media.action.IMAGE_CAPTURE" />     <category android:name="android.intent.category.DEFAULT" />   </intent-filter>  </activity> </application> </manifest>