Question

我有一个显示警告图像的Android原生应用程序，应用程序在后台工作，我想在屏幕上显示图像5秒，无论用户在哪个屏幕上。它甚至可能吗？

Answer 1

public class FloatingDialogActivity extends Activity implements View.OnTouchListener {

private static final String TAG = "FloatingDialogActivity";

RelativeLayout topLay;
FrameLayout draggableView;
float dX;
float dY;
int lastAction;
private boolean shouldClick;

@Override
protected void onCreate(Bundle savedInstanceState) {

    // TODO Auto-generated method stub
    super.onCreate(savedInstanceState);

    getWindow().addFlags(WindowManager.LayoutParams.FLAG_TURN_SCREEN_ON);
    getWindow().addFlags(WindowManager.LayoutParams.FLAG_SHOW_WHEN_LOCKED);
    getWindow().addFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON);

    setContentView(R.layout.floating_dialog_layout);
    topLay=(RelativeLayout)findViewById(R.id.topLay);
    draggableView=(FrameLayout)findViewById(R.id.draggableView);

    draggableView.setOnTouchListener(this);

}


@Override
public boolean onTouch(View view, MotionEvent event) {
    switch (event.getActionMasked()) {
        case MotionEvent.ACTION_DOWN:
            shouldClick = true;
            dX = view.getX() - event.getRawX();
            dY = view.getY() - event.getRawY();
            lastAction = MotionEvent.ACTION_DOWN;
            break;

        case MotionEvent.ACTION_MOVE:
            shouldClick = false;
            view.setY(event.getRawY() + dY);
            view.setX(event.getRawX() + dX);
            lastAction = MotionEvent.ACTION_MOVE;
            break;

        case MotionEvent.ACTION_UP:
            if (shouldClick)
                view.performClick();

            if (lastAction == MotionEvent.ACTION_DOWN)
                //  Toast.makeText(IncomingCallActivity.this, "Clicked!", Toast.LENGTH_SHORT).show();
                break;

        default:
            return false;
    }
    return true;
}

}

使用以下布局

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"

xmlns:tools="http://schemas.android.com/tools"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:orientation="vertical"
android:paddingRight="8dp"
android:paddingLeft="8dp"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:id="@+id/parentLay"
>
<FrameLayout
    android:layout_width="match_parent"
    android:id="@+id/draggableView"
    android:layout_height="match_parent">
    <RelativeLayout
        android:id="@+id/topLay"
        android:layout_width="match_parent"
        android:layout_height="200dp"
        android:layout_alignParentTop="true"
        android:layout_gravity="center"
        android:background="#4954a3"
        android:gravity="center">

        <TextView
            android:id="@+id/customerNameText"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_marginLeft="16dp"
           android:layout_marginTop="@dimen/activity_horizontal_margin"
            android:text="New User"
            android:textColor="#FFFFFF"
            android:textSize="20dp"
            />
    </RelativeLayout>
</FrameLayout>

在清单文件中添加活动主题

 <activity
        android:name="vivekdemo.FloatingDialogActivity"
        android:screenOrientation="portrait"
        android:theme="@style/Theme.Transparent">
        <intent-filter>
            <action android:name="android.intent.action.MAIN" />
            <category android:name="android.intent.category.LAUNCHER"/>
        </intent-filter>
    </activity>

在styles.xml中添加以下主题

<style name="Theme.Transparent" parent="android:Theme">
        <item name="android:windowIsTranslucent">true</item>
        <item name="android:windowBackground">@android:color/transparent</item>
        <item name="android:windowContentOverlay">@null</item>
        <item name="android:windowNoTitle">true</item>
        <item name="android:windowIsFloating">false</item>
        <item name="android:backgroundDimEnabled">false</item>
    </style>

在应用视图外显示图片

1 个答案: