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Android 实现"透明屏幕"
发表于 2017-5-12 15:15:55
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楼主
我在 Google Play 上看到一个挺有意思的app:
Url : https://play.google.com/store/apps/details?id=com.m2c.studio.transparent.screen
看着有点酷的样子,试着实现一下.
最终实现效果
效果
实现步骤
AndroidManifest.xml
- <?xml version="1.0" encoding="utf-8"?>
- <manifest xmlns:android="http://schemas.android.com/apk/res/android"
- package="con.song.wallpaper">
- <uses-permission android:name="android.permission.CAMERA"/>
- <uses-permission android:name="android.permission.SET_WALLPAPER"/>
- <application
- android:allowBackup="true"
- android:icon="@mipmap/ic_launcher"
- android:label="@string/app_name"
- android:supportsRtl="true"
- android:theme="@style/AppTheme">
- <activity android:name=".MainActivity">
- <intent-filter>
- <action android:name="android.intent.action.MAIN"/>
- <category android:name="android.intent.category.LAUNCHER"/>
- </intent-filter>
- </activity>
- <!-- 配置实时壁纸Service -->
- <service android:label="@string/app_name"
- android:name=".CameraLiveWallpaper"
- android:permission="android.permission.BIND_WALLPAPER">
- <!-- 为实时壁纸配置intent-filter -->
- <intent-filter>
- <action android:name="android.service.wallpaper.WallpaperService" />
- </intent-filter>
- <!-- 为实时壁纸配置meta-data -->
- <meta-data android:name="android.service.wallpaper"
- android:resource="@xml/livewallpaper" />
- </service>
- </application>
- </manifest>
复制代码 在res下面新建一个xml文件夹 然后新建一个livewallpaper.xml 内容如下:
- <?xml version="1.0" encoding="utf-8"?>
- <!-- ic_launcher 预览是显示的图片-->
- <wallpaper
- xmlns:android="http://schemas.android.com/apk/res/android"
- android:thumbnail="@mipmap/ic_launcher"/>
复制代码 实现动态壁纸的LiveWallpaper.java:
- package con.song.wallpaper;
- import android.hardware.Camera;
- import android.service.wallpaper.WallpaperService;
- import android.view.MotionEvent;
- import android.view.SurfaceHolder;
- import java.io.IOException;
- public class CameraLiveWallpaper extends WallpaperService {
- // 实现WallpaperService必须实现的抽象方法
- public Engine onCreateEngine() {
- // 返回自定义的CameraEngine
- return new CameraEngine();
- }
- class CameraEngine extends Engine implements Camera.PreviewCallback {
- private Camera camera;
- @Override
- public void onCreate(SurfaceHolder surfaceHolder) {
- super.onCreate(surfaceHolder);
- startPreview();
- // 设置处理触摸事件
- setTouchEventsEnabled(true);
- }
- @Override
- public void onTouchEvent(MotionEvent event) {
- super.onTouchEvent(event);
- // 时间处理:点击拍照,长按拍照
- }
- @Override
- public void onDestroy() {
- super.onDestroy();
- stopPreview();
- }
- @Override
- public void onVisibilityChanged(boolean visible) {
- if (visible) {
- startPreview();
- } else {
- stopPreview();
- }
- }
- /**
- * 开始预览
- */
- public void startPreview() {
- camera = Camera.open();
- camera.setDisplayOrientation(90);
- try {
- camera.setPreviewDisplay(getSurfaceHolder());
- } catch (IOException e) {
- e.printStackTrace();
- }
- camera.startPreview();
- }
- /**
- * 停止预览
- */
- public void stopPreview() {
- if (camera != null) {
- try {
- camera.stopPreview();
- camera.setPreviewCallback(null);
- // camera.lock();
- camera.release();
- } catch (Exception e) {
- e.printStackTrace();
- }
- camera = null;
- }
- }
- @Override
- public void onPreviewFrame(byte[] bytes, Camera camera) {
- camera.addCallbackBuffer(bytes);
- }
- }
- }
复制代码 启动动态壁纸的MainActivity.java:- package con.song.wallpaper;
- import android.Manifest;
- import android.content.Context;
- import android.content.Intent;
- import android.content.pm.PackageManager;
- import android.os.Bundle;
- import android.support.annotation.NonNull;
- import android.support.v4.app.ActivityCompat;
- import android.support.v4.content.ContextCompat;
- import android.support.v7.app.AppCompatActivity;
- import android.view.View;
- import android.widget.Toast;
- public class MainActivity extends AppCompatActivity {
- private static final int PERMISSIONS_REQUEST_CAMERA = 454;
- private Context mContext;
- static final String PERMISSION_CAMERA = Manifest.permission.CAMERA;
- @Override
- protected void onCreate(Bundle savedInstanceState) {
- super.onCreate(savedInstanceState);
- setContentView(R.layout.activity_main);
- mContext = this;
- findViewById(R.id.text)
- .setOnClickListener(new View.OnClickListener() {
- @Override
- public void onClick(View view) {
- checkSelfPermission();
- }
- });
- }
- /**
- * 检查权限
- */
- void checkSelfPermission() {
- if (ContextCompat.checkSelfPermission(mContext, PERMISSION_CAMERA) != PackageManager.PERMISSION_GRANTED) {
- ActivityCompat.requestPermissions(this,
- new String[]{PERMISSION_CAMERA},
- PERMISSIONS_REQUEST_CAMERA);
- } else {
- // setTransparentWallpaper();
- startWallpaper();
- }
- }
- @Override
- public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
- super.onRequestPermissionsResult(requestCode, permissions, grantResults);
- switch (requestCode) {
- case PERMISSIONS_REQUEST_CAMERA: {
- // If request is cancelled, the result arrays are empty.
- if (grantResults.length > 0
- && grantResults[0] == PackageManager.PERMISSION_GRANTED) {
- // setTransparentWallpaper();
- startWallpaper();
- } else {
- Toast.makeText(mContext, getString(R.string._lease_open_permissions), Toast.LENGTH_SHORT).show();
- }
- return;
- }
- }
- }
- /**
- * 选择壁纸
- */
- void startWallpaper() {
- final Intent pickWallpaper = new Intent(Intent.ACTION_SET_WALLPAPER);
- Intent chooser = Intent.createChooser(pickWallpaper, getString(R.string.choose_wallpaper));
- startActivity(chooser);
- }
- /**
- * 不需要手动启动服务
- */
- void setTransparentWallpaper() {
- startService(new Intent(mContext, CameraLiveWallpaper.class));
- }
- }
复制代码 这样一个简单装逼神器出来了...
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