Android調用相機拍攝照片並顯示到 ImageView控制項中

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在前面的一篇文章中曾介紹過簡單的開啟相機照相功能，詳見?Android簡單調用相機Camera功能，實現開啟照相功能?，這一次就會將前面拍攝的照片顯示到ImageView中，形成一個完整的效果看執行個體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;@Overridepublic void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_main);//SD_CARD_TEMP_DIR = Environment.getExternalStorageDirectory()+ File.separator + "tmp.jpg";//設定照相後儲存的檔案名稱，相似於快取檔案imageView = (ImageView)findViewById(R.id.imageView1);Button btn = (Button) findViewById(R.id.button1);btn.setOnClickListener(new OnClickListener() {@Overridepublic void onClick(View arg0) {// TODO Auto-generated method stubIntent 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);}});}@Overrideprotected void onActivityResult(int requestCode, int resultCode, Intent data) {// TODO Auto-generated method stubsuper.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" ><Buttonandroid:id="@+id/button1"android:layout_width="wrap_content"android:layout_height="wrap_content"android:layout_alignParentBottom="true"android:layout_alignParentRight="true"android:text="Button" /><ImageViewandroid: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，再配置一下許可權吧。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-sdkandroid:minSdkVersion="8"android:targetSdkVersion="16" /><uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" /><applicationandroid:allowBackup="true"android:hardwareAccelerated="false"android:icon="@drawable/ic_launcher"android:label="@string/app_name"android:theme="@style/AppTheme" ><activityandroid: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>

這個地方，還要注意的是 ?android:hardwareAccelerated="false"? 這一句，假設我們不加這一句的情況下。會非常easy出現下面問題Bitmap too large to be uploaded into a texture因此。我們須要將硬體加速功能關閉。

Android調用相機拍攝照片並顯示到 ImageView控制項中