Float Camera Service

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1. MainActivity.java

package com.jean.lee.floatcamera;

import android.annotation.SuppressLint;
import android.app.Activity;
import android.content.Intent;
import android.content.SharedPreferences;
import android.graphics.Rect;
import android.hardware.Camera;
import android.os.Bundle;
import android.util.DisplayMetrics;
import android.widget.Toast;

import com.jean.lee.floatcamera.service.FloatCameraService;
import com.jean.lee.floatcamera.util.SecLog;

@SuppressLint("NewApi")
public class MainActivity extends Activity {

	private static final String TAG = "FloatCamera";
	
	private static final String FLOAT_CAM_SERVICE_PREFERENCES = "pref_float_camera_service";
	private static final String KEY_PREFERENCES_SERVICE_STARTED = "key_preferences_service_started";
	private static final String KEY_PREFERENCES_SCREEN_HEIGHT = "key_preferences_screen_height";
	private static final String KEY_PREFERENCES_CAMERA_NUMBERS = "key_preferences_camera_numbers";

	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_main);
		SecLog.e(TAG, "onCreate");
	}

	@Override
	protected void onResume() {
		SecLog.e(TAG, "onResume");

		SharedPreferences mSharedPreferences = getSharedPreferences(FLOAT_CAM_SERVICE_PREFERENCES, Activity.MODE_PRIVATE);
		
		if(mSharedPreferences.getInt(KEY_PREFERENCES_CAMERA_NUMBERS, -2) == 0){
			Toast.makeText(this, R.string.toast_no_camera, Toast.LENGTH_SHORT).show();
			finish();
		}else if(mSharedPreferences.getInt(KEY_PREFERENCES_CAMERA_NUMBERS, -2) == -2){
			SharedPreferences.Editor editor = mSharedPreferences.edit();
	        editor.putInt(KEY_PREFERENCES_CAMERA_NUMBERS, Camera.getNumberOfCameras());
	        editor.commit();
		}

		if(mSharedPreferences.getInt(KEY_PREFERENCES_SCREEN_HEIGHT, 0) == 0){
			DisplayMetrics dm = new DisplayMetrics();
	        this.getWindowManager().getDefaultDisplay().getMetrics(dm);
	        int screenHeight = dm.heightPixels;
	        SecLog.e(TAG, "screenHeight="+screenHeight);
	        SharedPreferences.Editor editor = mSharedPreferences.edit();
	        editor.putInt(KEY_PREFERENCES_SCREEN_HEIGHT, screenHeight);
	        editor.commit();
		}        
		
		Intent intent = new Intent(MainActivity.this, FloatCameraService.class);
		SharedPreferences.Editor editor = mSharedPreferences.edit();
		if(!mSharedPreferences.getBoolean(KEY_PREFERENCES_SERVICE_STARTED, false)){
			SecLog.e(TAG, "call start service");
			startService(intent);
			editor.putBoolean(KEY_PREFERENCES_SERVICE_STARTED, true);
		}else {
			SecLog.e(TAG, "call stop service");
			stopService(intent);
			editor.putBoolean(KEY_PREFERENCES_SERVICE_STARTED, false);
		}
		
		editor.commit();
		
		finish();
		super.onResume();
	}

	@Override
	protected void onDestroy() {
		SecLog.e(TAG, "onDestroy");
		super.onDestroy();
	}

	@Override
	protected void onPause() {
		SecLog.e(TAG, "onPause");
		super.onPause();
	}
}

2. FloatCameraService.java

package com.jean.lee.floatcamera.service;

import java.io.IOException;
import java.lang.reflect.Field;

import android.annotation.SuppressLint;
import android.app.Activity;
import android.app.Service;
import android.content.Context;
import android.content.Intent;
import android.content.SharedPreferences;
import android.graphics.PixelFormat;
import android.hardware.Camera;
import android.hardware.Camera.CameraInfo;
import android.hardware.Camera.Parameters;
import android.os.IBinder;
import android.os.Vibrator;
import android.view.Gravity;
import android.view.LayoutInflater;
import android.view.MotionEvent;
import android.view.SurfaceHolder;
import android.view.SurfaceView;
import android.view.View;
import android.view.View.OnLongClickListener;
import android.view.View.OnTouchListener;
import android.view.WindowManager;
import android.view.WindowManager.LayoutParams;
import android.widget.LinearLayout;
import android.widget.Toast;

import com.jean.lee.floatcamera.R;
import com.jean.lee.floatcamera.util.SecLog;

@SuppressLint("NewApi")
public class FloatCameraService extends Service implements SurfaceHolder.Callback{
	
	private static final String TAG = "FloatCameraService";
	
	private static final String FLOAT_CAM_SERVICE_PREFERENCES = "pref_float_camera_service";
	private static final String KEY_PREFERENCES_CAMERA_ID = "key_preferences_camera_id";
	private static final String KEY_PREFERENCES_WINDOW_X = "key_preferences_window_x";
	private static final String KEY_PREFERENCES_WINDOW_Y = "key_preferences_window_y";
	private static final String KEY_PREFERENCES_WINDOW_WIDTH_BACK = "key_preferences_window_width_back";
	private static final String KEY_PREFERENCES_WINDOW_HEIGHT_BACK = "key_preferences_window_height_back";
	private static final String KEY_PREFERENCES_WINDOW_WIDTH_FRONT = "key_preferences_window_width_front";
	private static final String KEY_PREFERENCES_WINDOW_HEIGHT_FRONT = "key_preferences_window_height_front";
	private static final String KEY_PREFERENCES_STATUSBAR_HEIGHT = "key_preferences_statusbar_height";
	private static final String KEY_PREFERENCES_SCREEN_HEIGHT = "key_preferences_screen_height";
	private static final String KEY_PREFERENCES_CAMERA_NUMBERS = "key_preferences_camera_numbers";
	
	LinearLayout mFloatLayout;
	WindowManager.LayoutParams wmParams;
	WindowManager mWindowManager;
	
	private SurfaceView mSvPreview;
	private SurfaceHolder mSurfaceHolder;
	
	private Camera mCamera;
	private Parameters mParameters;
	
	private static final int DEFAULT_CAMERA_ID = CameraInfo.CAMERA_FACING_BACK;
	private static int mCameraId = DEFAULT_CAMERA_ID;
	private static int mCameraNumbers;
	
	private SharedPreferences mSharedPreferences;
	
	private boolean bLongPressed = false;
	private boolean bMultiTouchPressed = false;
	
	private static int mStatusBarHeight = 0;
	private static int mWindowWidth = 270;
	private static int mWindowHeight = 480;
	
	private static final int PREVIEW_4_3_WIDTH = 300;
	private static final int PREVIEW_4_3_HEIGHT = 400;
	
	private static final int PREVIEW_16_9_WIDTH = 270;
	private static final int PREVIEW_16_9_HEIGHT = 480;

	@Override
	public void onCreate() {
		SecLog.e(TAG, "onCreate");
		super.onCreate();
	}

	@Override
	public void onDestroy() {
		SecLog.e(TAG, "onDestroy");
		
		if(mFloatLayout != null)  
        {  
            mWindowManager.removeView(mFloatLayout);
        }
		
		if(null != mCamera){
			mCamera.stopPreview();
			mCamera.release();
			mCamera = null;
		}
		super.onDestroy();
	}

	@Override
	public int onStartCommand(Intent intent, int flags, int startId) {
		SecLog.e(TAG, "onStartCommand");

		mSharedPreferences = getSharedPreferences(FLOAT_CAM_SERVICE_PREFERENCES, Activity.MODE_PRIVATE);

		LayoutInflater inflater = LayoutInflater.from(getApplication());
        mFloatLayout = (LinearLayout) inflater.inflate(R.layout.float_layout, null);
        mSvPreview = (SurfaceView)mFloatLayout.findViewById(R.id.sv_preview);
        mSurfaceHolder = mSvPreview.getHolder();
        mSurfaceHolder.addCallback(this);

        mStatusBarHeight = mSharedPreferences.getInt(KEY_PREFERENCES_STATUSBAR_HEIGHT, 0);
        if(0 == mStatusBarHeight){
        	mStatusBarHeight = getStatusBarHeight(getBaseContext());

        	SharedPreferences.Editor editor = mSharedPreferences.edit();
			editor.putInt(KEY_PREFERENCES_STATUSBAR_HEIGHT, mStatusBarHeight);
			editor.commit();
        }
        
		openCamera();

		createFloatView();

		return super.onStartCommand(intent, flags, startId);
	}

	@Override
	public boolean onUnbind(Intent intent) {
		SecLog.e(TAG, "onUnbind");
		return super.onUnbind(intent);
	}

	@Override
	public IBinder onBind(Intent arg0) {
		SecLog.e(TAG, "onBind");
		return null;
	}
	
	@SuppressLint("InflateParams")
	private void createFloatView()  
    {
		SecLog.e(TAG, "createFloatView");
        wmParams = new WindowManager.LayoutParams();  
        mWindowManager = (WindowManager)getApplication().getSystemService(getApplication().WINDOW_SERVICE);  
        wmParams.type = LayoutParams.TYPE_PHONE;   
        //设置图片格式，效果为背景透明  
        wmParams.format = PixelFormat.RGBA_8888;
        //设置浮动窗口不可聚焦（实现操作除浮动窗口外的其他可见窗口的操作）  
        wmParams.flags = LayoutParams.FLAG_NOT_FOCUSABLE;        
        //调整悬浮窗显示的停靠位置为左侧置顶  
        wmParams.gravity = Gravity.LEFT | Gravity.TOP;         
        // 以屏幕左上角为原点，设置x、y初始值，相对于gravity  
        wmParams.x = mSharedPreferences.getInt(KEY_PREFERENCES_WINDOW_X, 0);
        wmParams.y = mSharedPreferences.getInt(KEY_PREFERENCES_WINDOW_Y, 0);
  
       /* //设置悬浮窗口长宽数据    
        wmParams.width = WindowManager.LayoutParams.WRAP_CONTENT;  
        wmParams.height = WindowManager.LayoutParams.WRAP_CONTENT;*/  
  
        setOptimizeWindowSize();
         // 设置悬浮窗口长宽数据 
        wmParams.width = mWindowWidth;
        wmParams.height = mWindowHeight;
        
        mWindowManager.addView(mFloatLayout, wmParams);

        mFloatLayout.measure(View.MeasureSpec.makeMeasureSpec(0,  
                View.MeasureSpec.UNSPECIFIED), View.MeasureSpec
                .makeMeasureSpec(0, View.MeasureSpec.UNSPECIFIED));  
        
        mFloatLayout.setOnTouchListener(new OnTouchListener(){

			@Override
			public boolean onTouch(View arg0, MotionEvent event) {
				
				switch(event.getActionMasked()){
				case MotionEvent.ACTION_DOWN:
					SecLog.e(TAG, "onTouch, ACTION_DOWN");
					break;
				case MotionEvent.ACTION_MOVE:
					SecLog.e(TAG, "onTouch, ACTION_MOVE");
					
					if(bLongPressed){
						//getRawX是触摸位置相对于屏幕的坐标，getX是相对于按钮的坐标  
				        wmParams.x = (int) event.getRawX() - mSvPreview.getMeasuredWidth()/2;  
				        //减25为状态栏的高度  
				        wmParams.y = (int) event.getRawY() - mSvPreview.getMeasuredHeight()/2 - mStatusBarHeight;

				        mWindowManager.updateViewLayout(mFloatLayout, wmParams);
					}
					break;
				case MotionEvent.ACTION_POINTER_DOWN:
					SecLog.e(TAG, "onTouch, ACTION_POINTER_DOWN");
					break;
				case MotionEvent.ACTION_POINTER_UP:
					SecLog.e(TAG, "onTouch, ACTION_POINTER_UP");
					break;
				case MotionEvent.ACTION_UP:
					SecLog.e(TAG, "onTouch, ACTION_UP");
					
					if(bLongPressed){
						
						bLongPressed = false;
						
						SharedPreferences.Editor editor = mSharedPreferences.edit();
						editor.putInt(KEY_PREFERENCES_WINDOW_X, wmParams.x);
						editor.putInt(KEY_PREFERENCES_WINDOW_Y, wmParams.y);
						editor.commit();
						
					}else{
						if(mSharedPreferences.getInt(KEY_PREFERENCES_CAMERA_NUMBERS, -2) == 1){
							Toast.makeText(getBaseContext(), R.string.toast_only_one_camera, Toast.LENGTH_SHORT).show();
							return false;
						}
						switchCamera();
						
						startPreview();
					}

					break;
				default:
					SecLog.e(TAG, "onTouch,event="+event.getActionMasked());
					break;
				}
				return false;
			}
        	
        });
        
        mFloatLayout.setOnLongClickListener(new OnLongClickListener(){

			@Override
			public boolean onLongClick(View arg0) {
				SecLog.e(TAG, "onLongClick");
				
				bLongPressed = true;
				
				Vibrator vibrator = (Vibrator)getSystemService(Context.VIBRATOR_SERVICE);
				vibrator.vibrate(100);

				return false;
			}
        	
        });
     }

	@Override
	public void surfaceChanged(SurfaceHolder arg0, int arg1, int arg2, int arg3) {
		SecLog.e(TAG, "surfaceChanged");
	}


	@Override
	public void surfaceCreated(SurfaceHolder arg0) {
		SecLog.e(TAG, "surfaceCreated");
		
		startPreview();
	}

	private void openCamera(){
		SecLog.e(TAG, "openCamera");
		
		if(null == mCamera && null != mSharedPreferences){
			mCameraId = mSharedPreferences.getInt(KEY_PREFERENCES_CAMERA_ID, DEFAULT_CAMERA_ID);
			mCamera = Camera.open(mCameraId);
			mParameters = mCamera.getParameters();
		}
	}
	
	private void switchCamera(){
		SecLog.e(TAG, "switchCamera");

		if(null != mCamera){
			mCamera.stopPreview();
			mCamera.release();
			mCamera = null;
		}
		
		SharedPreferences.Editor editor = mSharedPreferences.edit();
		mCameraId = mSharedPreferences.getInt(KEY_PREFERENCES_CAMERA_ID, DEFAULT_CAMERA_ID);
		if(CameraInfo.CAMERA_FACING_BACK == mCameraId){
			mCameraId = CameraInfo.CAMERA_FACING_FRONT;
			mCamera = Camera.open(mCameraId);
		}else{
			mCameraId = CameraInfo.CAMERA_FACING_BACK;
			mCamera = Camera.open(mCameraId);
		}

		editor.putInt(KEY_PREFERENCES_CAMERA_ID, mCameraId);
		editor.commit();
		
		if(mCamera != null){
			mParameters = mCamera.getParameters();
		}
	}
	
	private void startPreview(){
		SecLog.e(TAG, "startPreview");
		if(null != mCamera){
			
			try {
				mCamera.setPreviewDisplay(mSurfaceHolder);
			} catch (IOException e) {
				e.printStackTrace();
			}
			
			if(null != mParameters){
				SecLog.e(TAG, "preview size:"+mParameters.getPreviewSize().width+"x"+mParameters.getPreviewSize().height);
			}
			mCamera.setDisplayOrientation(90);

			mCamera.startPreview();

			updateWindownSize();
		}
	}

	@Override
	public void surfaceDestroyed(SurfaceHolder arg0) {
		SecLog.e(TAG, "surfaceDestroyed");
	}

	public static int getStatusBarHeight(Context context){
		SecLog.e(TAG, "getStatusBarHeight");
        Class<?> c = null;
        Object obj = null;
        Field field = null;
        int x = 0, statusBarHeight = 0;
        try {
            c = Class.forName("com.android.internal.R$dimen");
            obj = c.newInstance();
            field = c.getField("status_bar_height");
            x = Integer.parseInt(field.get(obj).toString());
            statusBarHeight = context.getResources().getDimensionPixelSize(x);
        } catch (Exception e1) {
            e1.printStackTrace();
        }
        return statusBarHeight;
    }
	
	public void setOptimizeWindowSize(){
		SecLog.e(TAG, "setOptimizeWindowSize");
		
		if(mCameraId == CameraInfo.CAMERA_FACING_BACK) {
			mWindowWidth = mSharedPreferences.getInt(KEY_PREFERENCES_WINDOW_WIDTH_BACK, 0);
			mWindowHeight = mSharedPreferences.getInt(KEY_PREFERENCES_WINDOW_HEIGHT_BACK, 0);
		}else{
			mWindowWidth = mSharedPreferences.getInt(KEY_PREFERENCES_WINDOW_WIDTH_FRONT, 0);
			mWindowHeight = mSharedPreferences.getInt(KEY_PREFERENCES_WINDOW_HEIGHT_FRONT, 0);
		}
		
		if(0 == mWindowWidth || 0 == mWindowHeight) {
			
			int screenHeight = mSharedPreferences.getInt(KEY_PREFERENCES_SCREEN_HEIGHT, 0);
			float ratio = (float)mParameters.getPreviewSize().width/(float)mParameters.getPreviewSize().height;

			if(Math.abs(ratio-16.0/9.0) < 1.0E-6) {// 16/9
				
				mWindowWidth = PREVIEW_16_9_WIDTH;
				mWindowHeight = PREVIEW_16_9_HEIGHT;
				if(screenHeight < 1000){
					mWindowWidth = mWindowWidth*5/6;
					mWindowHeight = mWindowHeight*5/6;
				}
			}else if(Math.abs(ratio-4.0/3.0) < 1.0E-6){

				mWindowWidth = PREVIEW_4_3_WIDTH;
				mWindowHeight = PREVIEW_4_3_HEIGHT;
				if(screenHeight < 1000){
					mWindowWidth = mWindowWidth*4/5;
					mWindowHeight = mWindowHeight*4/5;
				}
			}else{
				mWindowWidth = PREVIEW_4_3_WIDTH;
				mWindowHeight = PREVIEW_4_3_HEIGHT;
			}
			
			SecLog.e(TAG, "width height:"+mWindowWidth+","+mWindowHeight);
			SharedPreferences.Editor editor = mSharedPreferences.edit();
			if(mCameraId == CameraInfo.CAMERA_FACING_BACK) {
				editor.putInt(KEY_PREFERENCES_WINDOW_WIDTH_BACK, mWindowWidth);
				editor.putInt(KEY_PREFERENCES_WINDOW_HEIGHT_BACK, mWindowHeight);
			}else{
				editor.putInt(KEY_PREFERENCES_WINDOW_WIDTH_FRONT, mWindowWidth);
				editor.putInt(KEY_PREFERENCES_WINDOW_HEIGHT_FRONT, mWindowHeight);
			}
			editor.commit();
		}		
	}
	
	public void updateWindownSize(){
		SecLog.e(TAG, "updateWindownSize");
		
		setOptimizeWindowSize();
		
		wmParams.width = mWindowWidth;
        wmParams.height = mWindowHeight;
        
        mWindowManager.updateViewLayout(mFloatLayout, wmParams);
	}
}

3. Manifest.xml

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.jean.lee.floatcamera"
    android:versionCode="1"
    android:versionName="1.0" >

    <uses-sdk
        android:minSdkVersion="8"
        android:targetSdkVersion="14" />
    
    <uses-permission android:name="android.permission.SYSTEM_ALERT_WINDOW" />
    <uses-permission android:name="android.permission.CAMERA"/>
    <uses-permission android:name="android.permission.VIBRATE" />

    <application
        android:allowBackup="true"
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name" >
        <activity
            android:name=".MainActivity"
            android:label="@string/app_name"
            android:theme="@android:style/Theme.NoDisplay" >
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
        <service android:name=".service.FloatCameraService"></service>
    </application>

</manifest>

4. float_layout.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical" >
    
    <SurfaceView
    	android:id="@+id/sv_preview"
    	android:visibility="visible"
    	android:text="TestTest"
        android:layout_width="match_parent"
        android:layout_height="match_parent" />

</LinearLayout>

Float Camera Service

标签：

原文地址：http://blog.csdn.net/torvalbill/article/details/43066559