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[操作系统]Android 调用系统照相机拍照和录像


本文实现android系统照相机的调用来拍照

项目的布局相当简单,只有一个Button:

<RelativeLayout ="http://schemas.android.com/apk/res/android"  ="http://schemas.android.com/tools"  android:layout_width="match_parent"  android:layout_height="match_parent"  tools:context=".MainActivity" >  <Button    android:onClick="click"    android:layout_width="wrap_content"    android:layout_height="wrap_content"    android:layout_centerHorizontal="true"    android:layout_centerVertical="true"    android:text="调用系统相机拍照" /></RelativeLayout>

首先打开packages\apps\Camera文件夹下面的清单文件,找到下面的代码:

    <activity android:name="com.android.camera.Camera"        android:configChanges="orientation|keyboardHidden"        android:theme="@android:style/Theme.Black.NoTitleBar.Fullscreen"        android:screenOrientation="landscape"        android:clearTaskOnLaunch="true"        android:taskAffinity="android.task.camera">      <intent-filter>        <action android:name="android.intent.action.MAIN" />        <category android:name="android.intent.category.DEFAULT" />        <category android:name="android.intent.category.LAUNCHER" />      </intent-filter>      <intent-filter>        <action android:name="android.media.action.IMAGE_CAPTURE" />        <category android:name="android.intent.category.DEFAULT" />      </intent-filter>      <intent-filter>        <action android:name="android.media.action.STILL_IMAGE_CAMERA" />        <category android:name="android.intent.category.DEFAULT" />      </intent-filter>    </activity>

相关代码如下:

public class MainActivity extends Activity {  @Override  protected void onCreate(Bundle savedInstanceState) {    super.onCreate(savedInstanceState);    setContentView(R.layout.activity_main);  }  public void click(View view) {    /*     * <intent-filter> <action     * android:name="android.media.action.IMAGE_CAPTURE" /> <category     * android:name="android.intent.category.DEFAULT" /> </intent-filter>     */    // 激活系统的照相机进行拍照    Intent intent = new Intent();    intent.setAction("android.media.action.IMAGE_CAPTURE");    intent.addCategory("android.intent.category.DEFAULT");        //保存照片到指定的路径    File file = new File("/sdcard/image.jpg");    Uri uri = Uri.fromFile(file);    intent.putExtra(MediaStore.EXTRA_OUTPUT, uri);        startActivity(intent);  }}

实现激活录像功能的相关代码也很简单:

public class MainActivity extends Activity {  @Override  protected void onCreate(Bundle savedInstanceState) {    super.onCreate(savedInstanceState);    setContentView(R.layout.activity_main);  }  public void click(View view) {    /*     * <intent-filter> <action     * android:name="android.media.action.VIDEO_CAPTURE" /> <category     * android:name="android.intent.category.DEFAULT" /> </intent-filter>     */    // 激活系统的照相机进行录像    Intent intent = new Intent();    intent.setAction("android.media.action.VIDEO_CAPTURE");    intent.addCategory("android.intent.category.DEFAULT");    // 保存录像到指定的路径    File file = new File("/sdcard/video.3pg");    Uri uri = Uri.fromFile(file);    intent.putExtra(MediaStore.EXTRA_OUTPUT, uri);    startActivityForResult(intent, 0);  }    @Override  protected void onActivityResult(int requestCode, int resultCode, Intent data) {    Toast.makeText(this, "调用照相机完毕", 0).show();    super.onActivityResult(requestCode, resultCode, data);      }}