Android 全局悬浮按钮，悬浮按钮点击事件，mWindowManager.addView

原创已于 2024-06-19 10:40:06 修改 · 3.3k 阅读

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文章标签：

#悬浮View #悬浮按钮 #WindowManager

于 2020-07-02 09:00:02 首次发布

Android开发专栏收录该内容

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1、申请悬浮与其他应用上的权限

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

2、调用WindowManager.addView(view,params) 显示悬浮view。实现如微信视频通话，悬浮于所有应用之上

隐藏悬浮view mWindowManager.removeView(mview);

实现demo https://download.youkuaiyun.com/download/meixi_android/89447589

实现效果：

实现方法：

在自定义baseActivity里面添加viwe即可。在子activity里刷新悬浮View即可

public abstract class BaseActivity extends BaseCommonActivity {

    LinearLayout saoli,ewmli;
    ImageView imageView;

    private QrCodeDialog mMQrCodeDialog;

    public static final int SECURITY_ACTIVITY_REQUEST_DD = 30008;

    //需要处理全屏逻辑之类的操作,在子类重写beforeSetContentView方法做处理
    @Override
    protected void beforeSetContentView() {
        super.beforeSetContentView();
        setTranslucentStatus();
        setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_PORTRAIT);
    }

    //需要在每个Activity处理逻辑,直接在onCreate方法处理
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        createFloatActionButtons();
        ObServernotice.getInstance().addObserver(observer);

    }

    MyObserver observer = new MyObserver() {
        @Override
        public void update(int id, int intparameter, final String string, Bitmap bitmap) {
            if (id==999){

                if (intparameter==0){
                    saoli.setVisibility(View.GONE);
                    ewmli.setVisibility(View.GONE);
                }else if (intparameter==1){
                    saoli.setVisibility(View.VISIBLE);
                    ewmli.setVisibility(View.VISIBLE);

                    mMQrCodeDialog = new QrCodeDialog(BaseActivity.this) {
                        @Override
                        public String setIvQrCode() {
                            return QrActivity.QR_TAG_ORDER + string;
                        }
                    };
                    imageView.setImageBitmap(bitmap);

                }
            }
        }
    };

    private void createFloatActionButtons() {
        View v = getWindow().getLayoutInflater().inflate(R.layout.layout_float_action_buttons, null);
        FrameLayout.LayoutParams layoutParams = new FrameLayout.LayoutParams(FrameLayout.LayoutParams.WRAP_CONTENT, FrameLayout.LayoutParams.WRAP_CONTENT);
        layoutParams.gravity = Gravity.BOTTOM | Gravity.RIGHT;
        addContentView(v, layoutParams);
        saoli = findViewById(R.id.saoli);
        ewmli = findViewById(R.id.ewmli);
        imageView = findViewById(R.id.ddmaimg);
        initShowfloat();
        saoli.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                scan();
            }
        });
        ewmli.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                if (mMQrCodeDialog != null) {
                    mMQrCodeDialog.show();
                }
            }
        });
    }

    public void initShowfloat(){
        int ss = ShareUtil.getSharedInt("floatint");
        if (ss==1){
            saoli.setVisibility(View.VISIBLE);
            ewmli.setVisibility(View.VISIBLE);
        }else {
            saoli.setVisibility(View.GONE);
            ewmli.setVisibility(View.GONE);
        }
        final String ewmstring =ShareUtil.getSharedString("ewmss");
        if (!TextUtils.isEmpty(ewmstring)){
            Bitmap bitmap = QRCodeEncoder.syncEncodeQRCode(QrActivity.QR_TAG_ORDER+ewmstring,
                    BGAQRCodeUtil.dp2px(BaseActivity.this, ResUtil.getPx(R.dimen.normal_340dp)),
                    ContextCompat.getColor(BaseActivity.this, R.color.black), null);
            mMQrCodeDialog = new QrCodeDialog(BaseActivity.this) {
                @Override
                public String setIvQrCode() {
                    return QrActivity.QR_TAG_ORDER + ewmstring;
                }
            };
            imageView.setImageBitmap(bitmap);

        }

    }

    private void scan() {
        startActivity(QrActivity.newIntent(this, 0));
    }

    @Override
    public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions,
        @NonNull int[] grantResults) {
        PermissionUtil.getInstance(getApplicationContext())
            .onRequestPermissionsResult(requestCode, permissions, grantResults);
        super.onRequestPermissionsResult(requestCode, permissions, grantResults);
    }

    @Override
    protected void onDestroy() {
        super.onDestroy();
        ObServernotice.getInstance().removeObserver(observer);
        observer = null;
    }
}

方法二：

machine_state_view文件

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content">
    <FrameLayout
        android:background="@mipmap/ic_jxz"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content">
        <TextView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:visibility="gone"
            android:layout_gravity="right|top"
            android:text="2"
           >

        </TextView>
    </FrameLayout>
</RelativeLayout>

AbstractDragFloatActionButton文件

/**
 *meixi
 */
public abstract class AbstractDragFloatActionButton extends RelativeLayout {
    private int parentHeight;//悬浮的父布局高度
    private int parentWidth;

    public AbstractDragFloatActionButton(Context context) {
        this(context, null, 0);
    }

    public AbstractDragFloatActionButton(Context context, AttributeSet attrs) {
        this(context, attrs, 0);

    }

    public abstract int getLayoutId();

    public abstract void renderView(View view);

    public AbstractDragFloatActionButton(Context context, AttributeSet attrs, int defStyleAttr) {
        super(context, attrs, defStyleAttr);
        View view= LayoutInflater.from(context).inflate(getLayoutId(), this);
        renderView(view);
    }
    @Override
    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
        measureChildren(widthMeasureSpec, heightMeasureSpec);
        super.onMeasure(widthMeasureSpec, heightMeasureSpec);
    }



    @Override
    protected void onLayout(boolean b, int i, int i1, int i2, int i3) {
        View view = getChildAt(0);
        view.layout(0,0,view.getMeasuredWidth(),view.getMeasuredHeight());
    }

    private int lastX;
    private int lastY;

    private boolean isDrag;

    @Override
    public boolean onTouchEvent(MotionEvent event) {
        int rawX = (int) event.getRawX();
        int rawY = (int) event.getRawY();
        switch (event.getAction() & MotionEvent.ACTION_MASK) {
            case MotionEvent.ACTION_DOWN:
                setPressed(true);//默认是点击事件
                isDrag=false;//默认是非拖动而是点击事件
                getParent().requestDisallowInterceptTouchEvent(true);//父布局不要拦截子布局的监听
                lastX=rawX;
                lastY=rawY;
                ViewGroup parent;
                if(getParent()!=null){
                    parent= (ViewGroup) getParent();
                    parentHeight=parent.getHeight();
                    parentWidth=parent.getWidth();
                }
                break;
            case MotionEvent.ACTION_MOVE:
                isDrag = (parentHeight > 0 && parentWidth > 0);//只有父布局存在你才可以拖动
                if(!isDrag) break;

                int dx=rawX-lastX;
                int dy=rawY-lastY;
                //这里修复一些华为手机无法触发点击事件
                int distance= (int) Math.sqrt(dx*dx+dy*dy);
                isDrag = distance>0;//只有位移大于0说明拖动了
                if(!isDrag) break;

                float x=getX()+dx;
                float y=getY()+dy;
                //检测是否到达边缘 左上右下
                x=x<0?0:x>parentWidth-getWidth()?parentWidth-getWidth():x;
                y=y<0?0:y>parentHeight-getHeight()?parentHeight-getHeight():y;
                setX(x);
                setY(y);
                lastX=rawX;
                lastY=rawY;
                break;
            case MotionEvent.ACTION_UP:
                //如果是拖动状态下即非点击按压事件
                setPressed(!isDrag);
                break;
        }

        //如果不是拖拽，那么就不消费这个事件，以免影响点击事件的处理
        //拖拽事件要自己消费
        return isDrag || super.onTouchEvent(event);
    }

}

MachineStateView文件：

public class MachineStateView extends AbstractDragFloatActionButton {
    public static final String TAG = MachineStateView.class.getSimpleName();
    public MachineStateView(Context context) {
        super(context);
    }

    public MachineStateView(Context context, AttributeSet attrs) {
        super(context, attrs);
    }

    public MachineStateView(Context context, AttributeSet attrs, int defStyleAttr) {
        super(context, attrs, defStyleAttr);
    }

    @Override
    public int getLayoutId() {
        return R.layout.machine_state_view;//拿到你自己定义的悬浮布局
    }

    @Override
    public void renderView(View view) {
        //初始化那些布局
        Log.e(TAG,"MachineStateView" + view.getId());

    }
}