自定义控件+二维码

1.title.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="horizontal"
    android:background="#D4DBED"
    >

    <TextView
        android:textSize="20sp"
        android:gravity="center"
        android:id="@+id/fh"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="返回"
        android:layout_weight="1"
        />

   <TextView
       android:textSize="25sp"
       android:gravity="center"
       android:id="@+id/titletv"
       android:layout_width="wrap_content"
       android:layout_height="wrap_content"
       android:text="那些花儿"
       android:layout_weight="2"
       />


    <TextView
        android:textSize="20sp"
        android:gravity="center"
        android:id="@+id/tz"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="跳转"
        android:layout_weight="1"
        />
</LinearLayout>

2.自定义标题dytitle类

public class dytitle extends LinearLayout implements View.OnClickListener {

    private TextView fh;
    private TextView tz;
    private TextView titletv;
    private Return_Interface return_interface;
    public void setDytitle(Return_Interface return_interface){
        this.return_interface = return_interface;
    }
    public dytitle(Context context) {
        this(context,null);
    }

    public dytitle(Context context, @Nullable AttributeSet attrs) {
        this(context, attrs,0);
    }

    public dytitle(Context context, @Nullable AttributeSet attrs, int defStyleAttr) {
        super(context, attrs, defStyleAttr);

        View view = View.inflate(context, R.layout.title, this);
        fh = (TextView) view.findViewById(R.id.fh);
        tz = (TextView) view.findViewById(R.id.tz);
        titletv = (TextView) view.findViewById(R.id.titletv);
        fh.setOnClickListener(this);
        tz.setOnClickListener(this);

    }


    @Override
    public void onClick(View v) {
        switch (v.getId())
        {
            case R.id.fh:
                //return_interface.returnOnClick();
              // Intent intent2 = new Intent(getContext(), MainActivity.class);
               // getContext().startActivity(intent2);
                //view.getcontext().finish();.
                break;

            case R.id.tz:

                Intent intent = new Intent(getContext(), Main2Activity.class);
                getContext().startActivity(intent);

                break;



        }




    }
}

3.自定义圆环dyyh类

public class dyyh  extends View implements  Runnable  {

   /* Handler  handler =new Handler(){

        @Override
        public void handleMessage(Message msg) {
            super.handleMessage(msg);
         // Intent intent = new Intent(getContext(), CaptureActivity.class);
            //startActivityForResult(intent,1);
           }
    };*/

    Paint mpaint = new Paint();
    Paint mtvpaint = new Paint();
    Paint Mpaint = new Paint();

    private int progress=0;
    private RectF rectF;
    private boolean b = true;
    private  int  banjing=100;

    private Return_Interface return_interface;

    public void setReturn_interface(Return_Interface return_interface) {
        this.return_interface = return_interface;
    }

    public dyyh(Context context) {
        this(context,null);
    }

    public dyyh(Context context, @Nullable AttributeSet attrs) {
        this(context, attrs,0);
    }

    public dyyh(Context context, @Nullable AttributeSet attrs, int defStyleAttr) {
        super(context, attrs, defStyleAttr);


        init();
        TypedArray typedArray = getContext().getTheme().obtainStyledAttributes(attrs, R.styleable.dyyh, defStyleAttr, 0);
         banjing = typedArray.getInt(R.styleable.dyyh_dyyhradio,defStyleAttr);


    }


    @Override
    protected void onSizeChanged(int w, int h, int oldw, int oldh) {
        super.onSizeChanged(w, h, oldw, oldh);

        int centerx=w/2;
        int centery=h/2;


        rectF = new RectF();
        rectF.left=centerx-banjing;
        rectF.top=centery-banjing;
        rectF.right=centerx+banjing;
        rectF.bottom=centery+banjing;


    }

    private void init() {
        mpaint.setColor(Color.parseColor("#00FE00"));
        mpaint.setStyle(Paint.Style.STROKE);
        mpaint.setStrokeWidth(20);


        Mpaint.setColor(Color.parseColor("#888888"));
        Mpaint.setStyle(Paint.Style.STROKE);
        Mpaint.setStrokeWidth(20);



        mtvpaint.setTextSize(25);

    }

    @Override
    protected void onDraw(Canvas canvas) {
        super.onDraw(canvas);
        huahuan(canvas);
        huatext(canvas);
    }

    private void huatext(Canvas canvas) {
        String  tv=progress+"%";

        Paint.FontMetrics fm = new Paint.FontMetrics();
        //得到文字的高度
        int tvh= (int) Math.ceil(fm.descent-fm.ascent);
        int tvw= (int) mtvpaint.measureText(tv,0,tv.length());

        canvas.drawText(tv,getWidth()/2-tvw/2,getHeight()/2-tvh/2,mtvpaint);

    }

    private void huahuan(Canvas canvas) {
        canvas.drawArc(rectF,-90,360,false,Mpaint);
        canvas.drawArc(rectF,-90,(360*progress)/100,false,mpaint);

    }


    @Override
    public void run() {

        while(true)
        {
            if(progress<100)
            {
                progress++;
                try {
                    Thread.sleep(100);
                    postInvalidate();
                } catch (Exception e) {
                    e.printStackTrace();
                }
                b = false;
             }else{
                b = true;

                progress=0;
                return_interface.returnOnClick(b);
                break;
            }



             /*if(progress>=100)
             {

               try {
                     Thread.sleep(2000);
                 } catch (InterruptedException e) {
                     e.printStackTrace();
                 }
                 Intent intent = new Intent(getContext(), Main2Activity.class);
                 getContext().startActivity(intent);


            }*/



        }





    }




   /* public void tz(final Return_Interface return_interface){
        return_interface.returnOnClick();
        return;
    }*/
}

4.自定义流式布局lsbj类

public class lsbj  extends ViewGroup{
    public lsbj(Context context) {
        this(context,null);
    }

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

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

    }

    @Override
    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
        super.onMeasure(widthMeasureSpec, heightMeasureSpec);
        //测量view
        measureChildren(widthMeasureSpec,heightMeasureSpec);
    }



    /**
     * 用来确定子View的位置
     * @param changed
     * @param l  lef 相对于父容器
     * @param t  top
     * @param r  right
     * @param b  bottom
     */


    @Override
    protected void onLayout(boolean changed, int l, int t, int r, int b) {
         int  currentwidth=0;
         int  currentHeight=0;
        //得到子View的个数
        int  childcount=getChildCount();

        for(int i=0;i<childcount;i++)
        {
            //得到这个viewgroup里面的每一个子view
            View childView=getChildAt(i);


            //得到每一个子view的宽高
            int width=childView.getMeasuredWidth();
            int height=childView.getMeasuredHeight();

            //确定子view 的高度
           childView.layout(currentwidth,currentHeight,currentwidth+width,currentHeight+height);

            //累加所有的字view宽高
            currentwidth+=width;
            currentHeight+=height;






        }
}
}

5.自定义的接口Return_Interface

public interface Return_Interface {
        void returnOnClick(boolean b);
}

6.MainActivity

public class MainActivity extends AppCompatActivity{

    private dytitle dyt;
    private dyyh dyh;
    private TextView fh;


    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        dyt = (dytitle) findViewById(R.id.dyt);
        dyh = (dyyh) findViewById(R.id.dyh);
        fh = (TextView) dyt.findViewById(R.id.fh);
        fh.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                finish();
            }
        });
    }
    public   void  sm(View v)
    {
        new Thread(dyh).start();
        dyh.setReturn_interface(new Return_Interface() {
            @Override
            public void returnOnClick(boolean b) {
                if(b){
                    Intent intent = new Intent(MainActivity.this, CaptureActivity.class);
                    startActivityForResult(intent,1);
                }
            }
        });
    }

    @Override
    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
        super.onActivityResult(requestCode, resultCode, data);
        if (requestCode == 1) {
            //处理扫描结果（在界面上显示）
            if (null != data) {
                Bundle bundle = data.getExtras();
                if (bundle == null) {
                    return;
                }
                if (bundle.getInt(CodeUtils.RESULT_TYPE) == CodeUtils.RESULT_SUCCESS) {
                    String result = bundle.getString(CodeUtils.RESULT_STRING);
                    Toast.makeText(this, "解析结果:" + result, Toast.LENGTH_LONG).show();
                } else if (bundle.getInt(CodeUtils.RESULT_TYPE) == CodeUtils.RESULT_FAILED) {
                    Toast.makeText(MainActivity.this, "解析二维码失败", Toast.LENGTH_LONG).show();
                }
            }
        }
    }

}

7.Main2Activity

public class Main2Activity extends AppCompatActivity {

    private dytitle dy_title;
    private TextView fh;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main2);
        dy_title = (dytitle)findViewById(R.id.ddd);
        fh = (TextView)dy_title.findViewById(R.id.fh);
        fh.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                finish();
            }
        });
    }
}

8.activity_main

<com.example.zhoukao1mn.view.dytitle

       android:id="@+id/dyt"
       android:layout_width="match_parent"
       android:layout_height="wrap_content">

   </com.example.zhoukao1mn.view.dytitle>


   <com.example.zhoukao1mn.view.dyyh
       aaa:dyyhradio="100"
       android:id="@+id/dyh"
       android:layout_width="match_parent"
       android:layout_height="261dp" />

<Button
    android:id="@+id/sm"
    android:onClick="sm"
    android:text="扫描二维码"
    android:layout_width="match_parent"
    android:layout_height="wrap_content" />

9.activity_main2

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context="com.example.zhoukao1mn.Main2Activity"
    android:orientation="vertical"
    >


    <com.example.zhoukao1mn.view.dytitle
        android:id="@+id/ddd"
        android:layout_width="match_parent"
        android:layout_height="wrap_content">

    </com.example.zhoukao1mn.view.dytitle>





    <com.example.zhoukao1mn.view.lsbj
        android:layout_width="match_parent"
        android:layout_height="wrap_content">


        <TextView

            android:layout_width="150dp"
            android:layout_height="wrap_content"
            android:textSize="25sp"
            android:padding="5dp"
            android:background="#619EA0"
            />


        <TextView

            android:layout_width="150dp"
            android:layout_height="wrap_content"
            android:textSize="25sp"
            android:padding="5dp"
            android:background="#7561A0"
            />


        <TextView
            android:layout_width="150dp"
            android:layout_height="wrap_content"
            android:textSize="25sp"
            android:padding="5dp"
            android:background="#9FA061"
            />
</com.example.zhoukao1mn.view.lsbj>
</LinearLayout>

10.二维码的依赖,权限app类见下一篇博客