hello,i’m Shendi
在Android中想要创建悬浮窗分为三步
1.申请权限
2.使用服务启动悬浮窗
3.设置悬浮窗参数并添加进WindowManager
申请权限
首先需要申请悬浮窗权限,在清单文件中 manifest 下添加
<!-- 低版本悬浮窗所需权限 -->
<uses-permission android:name="android.permission.SYSTEM_ALERT_WINDOW"/>
在Activity中动态申请权限
public class MainActivity extends Activity {
/** 悬浮窗权限标识码 */
public static final int CODE_WINDOW = 0;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
// 申请悬浮窗权限
if (Build.VERSION.SDK_INT >= 23) {
if (!Settings.canDrawOverlays(this)) {
Toast.makeText(this, "请打开此应用悬浮窗权限-Shendi", Toast.LENGTH_SHORT).show();
startActivityForResult(new Intent(Settings.ACTION_MANAGE_OVERLAY_PERMISSION, Uri.parse("package:" + getPackageName())), CODE_WINDOW);
}
}
// 关闭当前activity,这样只显示悬浮窗
finish();
}
// 权限申请成功后的回调
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
switch (requestCode) {
// 不给权限就退出
case Permission.CODE_WINDOW:
if (resultCode != Activity.RESULT_OK) System.exit(0);
break;
default:
Toast.makeText(this, "未知权限回调: " + requestCode, Toast.LENGTH_SHORT).show();
}
}
}
使用服务启动悬浮窗
对于悬浮窗的操作主要使用 WindowManager
创建一个服务,并在清单文件中注册
public class TestService extends Service {
@Override
public int onStartCommand(Intent intent, int flags, int startId) {
return super.onStartCommand(intent, flags, startId);
}
@Override
public IBinder onBind(Intent intent) {
return null;
}
}
在清单文件的Application中注册服务
<service android:name=".TestService" />
在Activity中启动服务
Intent intent = new Intent(this, TestService.class);
startService(intent);
接下来需要创建悬浮窗的界面,这里方便演示直接使用代码创建
也可以使用inflate函数将xml文件变view对象
View.inflate(context, R.layout.main_activity, null);
在服务的onStartCommand函数中内容如下
@Override
public int onStartCommand(Intent intent, int flags, int startId) {
Button btn = new Button(this);
btn.setText("hello,world");
return super.onStartCommand(intent, flags, startId);
}
设置悬浮窗参数并添加进WindowManager
这里直接上代码,看注释
@Override
public int onStartCommand(Intent intent, int flags, int startId) {
Button btn = new Button(this);
btn.setText("hello,world");
// 获取WindowManager
WindowManager wm = (WindowManager) getSystemService(WINDOW_SERVICE);
// 创建布局参数
WindowManager.LayoutParams params = new WindowManager.LayoutParams();
/** 设置参数 */
params.type = Build.VERSION.SDK_INT >= Build.VERSION_CODES.O ?
WindowManager.LayoutParams.TYPE_APPLICATION_OVERLAY :
WindowManager.LayoutParams.TYPE_PHONE;
params.format = PixelFormat.RGBA_8888;
// 设置窗口的行为准则
params.flags = WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE;
//设置透明度
params.alpha = 1.0f;
//设置内部视图对齐方式,这边位置为左边靠上
params.gravity = Gravity.LEFT | Gravity.TOP;
//窗口的左上角坐标
params.x = 0;
params.y = 0;
//设置窗口的宽高,这里为自动
params.width = WindowManager.LayoutParams.WRAP_CONTENT;
params.height = WindowManager.LayoutParams.WRAP_CONTENT;
// 添加进WindowManager
wm.addView(btn, params);
return super.onStartCommand(intent, flags, startId);
}
完整代码如下
TestActivity
package shendi.app.game.robot;
import android.app.Activity;
import android.content.Intent;
import android.net.Uri;
import android.os.Build;
import android.os.Bundle;
import android.provider.Settings;
import android.widget.Toast;
public class TestActivity extends Activity {
/** 悬浮窗权限标识码 */
public static final int CODE_WINDOW = 0;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
// 申请悬浮窗权限
if (Build.VERSION.SDK_INT >= 23) {
if (!Settings.canDrawOverlays(this)) {
Toast.makeText(this, "请打开此应用悬浮窗权限-Shendi", Toast.LENGTH_SHORT).show();
startActivityForResult(new Intent(Settings.ACTION_MANAGE_OVERLAY_PERMISSION, Uri.parse("package:" + getPackageName())), CODE_WINDOW);
}
}
Intent intent = new Intent(this, TestService.class);
startService(intent);
// 关闭当前activity,这样只显示悬浮窗
finish();
}
// 权限申请成功后的回调
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
switch (requestCode) {
// 不给权限就退出
case Permission.CODE_WINDOW:
if (resultCode != Activity.RESULT_OK) System.exit(0);
break;
default:
Toast.makeText(this, "未知权限回调: " + requestCode, Toast.LENGTH_SHORT).show();
}
}
}
TestService
package shendi.app.game.robot;
import android.app.Service;
import android.content.Intent;
import android.graphics.PixelFormat;
import android.os.Build;
import android.os.IBinder;
import android.view.Gravity;
import android.view.WindowManager;
import android.widget.Button;
public class TestService extends Service {
@Override
public int onStartCommand(Intent intent, int flags, int startId) {
Button btn = new Button(this);
btn.setText("hello,world");
// 获取WindowManager
WindowManager wm = (WindowManager) getSystemService(WINDOW_SERVICE);
// 创建布局参数
WindowManager.LayoutParams params = new WindowManager.LayoutParams();
/** 设置参数 */
params.type = Build.VERSION.SDK_INT >= Build.VERSION_CODES.O ?
WindowManager.LayoutParams.TYPE_APPLICATION_OVERLAY :
WindowManager.LayoutParams.TYPE_PHONE;
params.format = PixelFormat.RGBA_8888;
// 设置窗口的行为准则
params.flags = WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE;
//设置透明度
params.alpha = 1.0f;
//设置内部视图对齐方式,这边位置为左边靠上
params.gravity = Gravity.LEFT | Gravity.TOP;
//窗口的左上角坐标
params.x = 0;
params.y = 0;
//设置窗口的宽高,这里为自动
params.width = WindowManager.LayoutParams.WRAP_CONTENT;
params.height = WindowManager.LayoutParams.WRAP_CONTENT;
// 添加进WindowManager
wm.addView(btn, params);
return super.onStartCommand(intent, flags, startId);
}
@Override
public IBinder onBind(Intent intent) {
return null;
}
}
运行 app,可以在屏幕左上角看到 hello,world的按钮悬浮
拖动效果
给悬浮组件添加触碰事件可以实现拖动效果,按钮组件不适用
这里给出简单的实现代码片段
private int upX, upY;
// 视图移动处理
view.setOnTouchListener(new View.OnTouchListener() {
@Override
public boolean onTouch(View v, MotionEvent event) {
switch (event.getActionMasked()) {
case MotionEvent.ACTION_DOWN:
upX = (int) event.getRawX();
upY = (int) event.getRawY();
break;
case MotionEvent.ACTION_MOVE:
// 与上一次位置相差不到5则不移动
if (event.getRawX() - upX > 5 || event.getRawY() - upY > 5) {
params.x = (int) event.getRawX();
params.y = (int) event.getRawY();
wm.updateViewLayout(view, params);
}
break;
case MotionEvent.ACTION_UP:
// 相差不到5则代表点击
if (event.getRawX() - upX < 5 && event.getRawY() - upY < 5) {
// TODO
}
break;
}
return false;
}
});
移除悬浮窗
可以在 onDestry 函数中进行移除
@Override
public void onDestroy() {
wm.removeView(view);
super.onDestroy();
}
转载:https://blog.csdn.net/qq_41806966/article/details/116430404
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