android屏幕颜色过滤调节（可用于护眼模式）

实现思路
1.android 创建透明 dailog 对dailog 进行背景颜色的改变达到遮罩下方内容的效果
2.颜色的过滤调节算法就是对分别对 rgb三原色的增加与减少
3.改变颜色核心代码：

 ImageView iv_main=dialog.findViewById(R.id.ll_main); iv_main.setBackgroundColor(Color.argb(alapha,red,green,blue));

实现的界面图

完整acitivty代码:

public class ReadActivity extends AppCompatActivity{    SeekBar sb_ld,sb_r,sb_b,sb_g;    ImageView iv_main;    Dialog dialog;    //红蓝绿 三原色的初始值    private int blue=100;    private int red=100;    private int green=100;    private int ld=0;    private int alapha=100;    private int blueProgress=0;    private int redProgress=0;    private int greenProgress=0;    private int ldProgress=0;    @Override    protected void onCreate(@Nullable Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.read);        initData();//        permission();        initListner();    }    private void initListner() {        Button bt_test=findViewById(R.id.bt_test);        bt_test.setOnClickListener(new View.OnClickListener() {            @Override            public void onClick(View v) {                openAleterWindow();            }        });    }    public  void initData(){    //每当打开acitivy 对 sharedprefernces 初始化        SharedPreferences myPreference=getSharedPreferences("myPreference", Context.MODE_PRIVATE);        SharedPreferences.Editor editor = myPreference.edit();        editor.putInt("ld", 0);        editor.putInt("red", 100);        editor.putInt("blue", 100);        editor.putInt("green", 100);        editor.commit();    }    public void getData(){  //获取 存储 sharePrefrence 保存的三原色值        SharedPreferences preferences=getSharedPreferences("myPreference", Context.MODE_PRIVATE);        ld=preferences.getInt("ld",0);        red=preferences.getInt("red",100);        green=preferences.getInt("green",100);        blue=preferences.getInt("blue",100);        Log.e("this","get"+ld+red+green+blue);        sb_ld.setProgress(ld);        sb_r.setProgress(100-red);        sb_g.setProgress(100-green);        sb_b.setProgress(100-blue);        iv_main.setBackgroundColor(Color.argb(alapha,red,green,blue));        changeAppBrightness(ld);        Log.e("this","getR"+red);    }    private void openAleterWindow() {   //打开 dailog 窗口 对 dailog 初始化        dialog=new Dialog(this,R.style.dialog_translucent);        dialog.setContentView(R.layout.dailog);        // 全屏        WindowManager.LayoutParams lp = dialog.getWindow().getAttributes();        lp.width = WindowManager.LayoutParams.MATCH_PARENT;        lp.height = WindowManager.LayoutParams.WRAP_CONTENT;        dialog.getWindow().setAttributes(lp);        dialog.show();        final ImageView iv_guanbi=dialog.findViewById(R.id.iv_guanbi);        iv_guanbi.setOnClickListener(new View.OnClickListener() {            @Override            public void onClick(View v) {                //保存 配置                SharedPreferences myPreference=getSharedPreferences("myPreference", Context.MODE_PRIVATE);                SharedPreferences.Editor editor = myPreference.edit();                if(ld>=0&&ld<=100&&red>=0&&red<=100&&blue>=0&blue<=100&&green>=0&&green<=100) {                    editor.putInt("ld", ld);                    editor.putInt("red", red);                    editor.putInt("blue", blue);                    editor.putInt("green", green);                    editor.commit();                }                Log.e("this","data"+ld+red+blue+green);                dialog.dismiss();            }        });        sb_ld=dialog.findViewById(R.id.sb_ld);        sb_r=dialog.findViewById(R.id.sb_r);        sb_b=dialog.findViewById(R.id.sb_b);        sb_g=dialog.findViewById(R.id.sb_g);        iv_main=dialog.findViewById(R.id.ll_main);        getData();        sb_ld.setOnSeekBarChangeListener(new SeekBar.OnSeekBarChangeListener() {            @Override            public void onProgressChanged(SeekBar seekBar, int progress, boolean fromUser) {                int add=progress-ldProgress;                ld=ld+add;                ldProgress=progress;                Log.e("this","ld:"+ld);                changeAppBrightness(ld);            }            @Override            public void onStartTrackingTouch(SeekBar seekBar) {            }            @Override            public void onStopTrackingTouch(SeekBar seekBar) {            }        });        sb_r.setOnSeekBarChangeListener(new SeekBar.OnSeekBarChangeListener() {            @Override            public void onProgressChanged(SeekBar seekBar, int progress, boolean fromUser) {                int add=progress-redProgress;                red=red-add;                redProgress=progress;                Log.e("this","red:"+red);                iv_main.setBackgroundColor(Color.argb(alapha,red,green,blue));            }            @Override            public void onStartTrackingTouch(SeekBar seekBar) {            }            @Override            public void onStopTrackingTouch(SeekBar seekBar) {            }        });        sb_b.setOnSeekBarChangeListener(new SeekBar.OnSeekBarChangeListener() {            @Override            public void onProgressChanged(SeekBar seekBar, int progress, boolean fromUser) {//                View view=LayoutInflater.from(ReadActivity.this).inflate(R.layout.dailog,null);//                view.setBackgroundColor(Color.argb(1,255,0,0));//                dialog.setContentView(view);                int add=progress-blueProgress;                blue=blue-add;                blueProgress=progress;                Log.e("this","blue:"+blue);                iv_main.setBackgroundColor(Color.argb(alapha,red,green,blue));            }            @Override            public void onStartTrackingTouch(SeekBar seekBar) {            }            @Override            public void onStopTrackingTouch(SeekBar seekBar) {            }        });        sb_g.setOnSeekBarChangeListener(new SeekBar.OnSeekBarChangeListener() {            @Override            public void onProgressChanged(SeekBar seekBar, int progress, boolean fromUser) {                int add=progress-greenProgress;                green=green-add;                greenProgress=progress;                Log.e("this","green:"+green);                iv_main.setBackgroundColor(Color.argb(alapha,red,green,blue));            }            @Override            public void onStartTrackingTouch(SeekBar seekBar) {            }            @Override            public void onStopTrackingTouch(SeekBar seekBar) {            }        });    }    public void permission(){        if (Build.VERSION.SDK_INT >= 23) {            if(!Settings.canDrawOverlays(this)) {                Intent intent = new Intent(Settings.ACTION_MANAGE_OVERLAY_PERMISSION);                startActivity(intent);            }    }}    public void changeAppBrightness(int brightness) {   //改变系统屏幕亮度        WindowManager.LayoutParams lp = getWindow().getAttributes();        lp.screenBrightness = Float.valueOf(brightness) * (1f / 255f);        getWindow().setAttributes(lp);    }}

dailog.xml

<?xml version="1.0" encoding="utf-8"?><RelativeLayout    xmlns:android="http://schemas.android.com/apk/res/android"    android:layout_width="match_parent"    android:layout_height="match_parent"    >    <ImageView        android:id="@+id/iv_guanbi"        android:layout_width="50dp"        android:layout_height="50dp"        android:src="@drawable/guanbi"        />    <ImageView        android:id="@+id/ll_main"        android:layout_width="match_parent"        android:layout_height="match_parent"        />    <LinearLayout        android:layout_width="match_parent"        android:layout_height="wrap_content"        android:layout_alignParentBottom="true"        android:orientation="vertical"        >        <LinearLayout            android:id="@+id/ll_ld"            android:layout_width="match_parent"            android:layout_height="wrap_content"            android:orientation="horizontal"            >            <TextView                android:layout_width="wrap_content"                android:layout_height="wrap_content"                android:text="亮度调节:"                />            <SeekBar                android:id="@+id/sb_ld"                android:layout_width="match_parent"                android:layout_height="wrap_content" />        LinearLayout>        <LinearLayout            android:id="@+id/ll_r"            android:layout_width="match_parent"            android:layout_height="wrap_content"            android:orientation="horizontal"            >            <TextView                android:layout_width="wrap_content"                android:layout_height="wrap_content"                android:text="红光调节:"                />            <SeekBar                android:id="@+id/sb_r"                android:layout_width="match_parent"                android:layout_height="wrap_content" />        LinearLayout>        <LinearLayout            android:id="@+id/ll_b"            android:layout_width="match_parent"            android:layout_height="wrap_content"            android:orientation="horizontal"            >            <TextView                android:layout_width="wrap_content"                android:layout_height="wrap_content"                android:text="蓝光调节:"                />            <SeekBar                android:id="@+id/sb_b"                android:layout_width="match_parent"                android:layout_height="wrap_content" />        LinearLayout>        <LinearLayout            android:id="@+id/ll_g"            android:layout_width="match_parent"            android:layout_height="wrap_content"            android:orientation="horizontal"            >            <TextView                android:layout_width="wrap_content"                android:layout_height="wrap_content"                android:text="绿光调节:"                />            <SeekBar                android:id="@+id/sb_g"                android:layout_width="match_parent"                android:layout_height="wrap_content" />        LinearLayout>    LinearLayout>RelativeLayout>

read.xml

<?xml version="1.0" encoding="utf-8"?><RelativeLayout    xmlns:android="http://schemas.android.com/apk/res/android"    android:layout_width="match_parent"    android:layout_height="match_parent">        <Button        android:id="@+id/bt_test"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:text="调节"        />RelativeLayout>

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