Android 安卓：画一个圆圈，里面有文字_Android_Android Layout_Android Canvas_Android View

Android 安卓：画一个圆圈，里面有文字

android android-layout

Android 安卓：画一个圆圈，里面有文字,android,android-layout,android-canvas,android-view,Android,Android Layout,Android Canvas,Android View,我需要在我的片段中画三个圆圈，圆圈大小不同，我指的是这个我得到的结果是这是我的XML代码：更新 <?xml version="1.0" encoding="utf-8"?> <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_heigh

我需要在我的片段中画三个圆圈，圆圈大小不同，我指的是这个我得到的结果是

这是我的XML代码：更新

<?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"
        android:gravity="center" >
         <TextView
             android:id="@+id/large_volume"
             android:layout_width="185dp"
             android:layout_height="185dp"
             android:background="@drawable/circle"
             android:gravity="center"
             android:text="My name is NON"
             android:textColor="#FFFFFF"
             android:textSize="10dp" />

         <TextView
             android:id="@+id/medium_volume"
             android:layout_width="120dp"
             android:layout_height="120dp"
             android:layout_alignTop="@+id/large_volume"
             android:layout_toRightOf="@+id/large_volume"
             android:background="@drawable/circle"
             android:gravity="center"
             android:text="My name is NON"
             android:textColor="#FFFFFF"
             android:textSize="10dp" />

         <TextView
             android:id="@+id/TextView02"
             android:layout_width="90dp"
             android:layout_height="90dp"
             android:layout_below="@+id/medium_volume"
             android:layout_toRightOf="@+id/large_volume"
             android:background="@drawable/circle"
             android:gravity="center"
             android:layout_marginTop="-3dp"
             android:layout_marginLeft="-17dp"
             android:text="My name is NON"
             android:textColor="#FFFFFF"
             android:textSize="10dp" />

    </RelativeLayout>

但我需要的是这样

您可以看到这些圆必须靠得很近，但当我使用XML视图时，我无法实现这一点。我需要

onClickListeners

在我的圈子里，这就是我为什么使用视图的原因

这是可以通过画布绘制实现的，我听说画布不是视图，所以这将限制我提供单击侦听器，如果我错了，请纠正我

更新：

我通过XML方法来满足我的需求，有没有办法通过画布绘制来实现这一点，我是否应该为此发布另一个问题？？


<?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"
    android:orientation="vertical" >

    <TextView
         android:id="@+id/TextView02"
        android:layout_width="125dp"
        android:layout_height="125dp"
        android:layout_alignBottom="@+id/linearLayout1"
        android:layout_marginBottom="83dp"
        android:layout_toEndOf="@+id/linearLayout1"
        android:background="@drawable/circle"
        android:gravity="center"
        android:text="TextView"
        android:layout_marginEnd="5dp"
        android:orientation="vertical" />

    <TextView
        android:id="@+id/textView1"
        android:layout_width="185dp"
        android:layout_height="185dp"
        android:layout_marginStart="5dp"
        android:layout_alignParentLeft="true"
        android:layout_centerVertical="true"
        android:background="@drawable/circle"
        android:gravity="center"
        android:text="TextView" 
        android:orientation="vertical" />

    <TextView
        android:id="@+id/TextView01"
        android:layout_width="90dp"
        android:layout_height="90dp"
        android:layout_alignTop="@+id/linearLayout1"
        android:layout_marginTop="113dp"
        android:layout_toEndOf="@+id/linearLayout1"
        android:background="@drawable/circle"
        android:gravity="center"
        android:text="TextView" 
        android:orientation="vertical" />

</RelativeLayout>

您可以直接将backroud或drawable设置为textview。您可以使用drawablepadding等

或者您可以使用： android:drawableStart=“@drawable/ic\u cab\u done\u holo\u dark”试试这个

    <?xml version="1.0" encoding="utf-8"?>
    <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content" >

        <RelativeLayout
            android:layout_width="wrap_content"
            android:layout_height="wrap_content" >

            <TextView
                android:id="@+id/num_txt"
                android:layout_width="100dp"
                android:layout_height="100dp"
                android:layout_marginTop="0dp"
                android:background="@drawable/bg_red"
                android:gravity="center"
                android:text="My name is NON"
                android:textColor="#FFFFFF"
                android:textSize="10dp" />

        </RelativeLayout>

    </RelativeLayout>

import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.util.AttributeSet;
import android.widget.TextView;

public class CircularTextView extends TextView
{
private float strokeWidth;
int strokeColor,solidColor;

public CircularTextView(Context context) {
    super(context);
}

public CircularTextView(Context context, AttributeSet attrs) {
    super(context, attrs);
}

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


@Override
public void draw(Canvas canvas) {

    Paint circlePaint = new Paint();
    circlePaint.setColor(solidColor);
    circlePaint.setFlags(Paint.ANTI_ALIAS_FLAG);

    Paint strokePaint = new Paint();
    strokePaint.setColor(strokeColor);
    strokePaint.setFlags(Paint.ANTI_ALIAS_FLAG);

    int  h = this.getHeight();
    int  w = this.getWidth();

    int diameter = ((h > w) ? h : w);
    int radius = diameter/2;

    this.setHeight(diameter);
    this.setWidth(diameter);

    canvas.drawCircle(diameter / 2 , diameter / 2, radius, strokePaint);

    canvas.drawCircle(diameter / 2, diameter / 2, radius-strokeWidth, circlePaint);

    super.draw(canvas);
}

public void setStrokeWidth(int dp)
{
    float scale = getContext().getResources().getDisplayMetrics().density;
    strokeWidth = dp*scale;

}

public void setStrokeColor(String color)
{
    strokeColor = Color.parseColor(color);
}

public void setSolidColor(String color)
{
    solidColor = Color.parseColor(color);

}
}

编辑代码

    <?xml version="1.0" encoding="utf-8"?>
    <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
        android:layout_width="wrap_content"
        android:layout_height="match_parent" >
         <TextView
             android:id="@+id/num_txt"
             android:layout_width="185dp"
             android:layout_height="185dp"

             android:layout_alignParentTop="true"
             android:layout_marginTop="163dp"
             android:background="@drawable/bg_red"
             android:gravity="center"
             android:text="My name is NON"
             android:textColor="#FFFFFF"
             android:layout_marginLeft="10dp"
             android:textSize="10dp" />

         <TextView
             android:id="@+id/TextView02"
             android:layout_width="90dp"
             android:layout_height="90dp"
             android:layout_alignParentRight="true"
             android:layout_alignTop="@+id/TextView01"
             android:layout_marginRight="90dp"
             android:layout_marginTop="122dp"
             android:background="@drawable/bg_red"
             android:gravity="center"
             android:text="My name is NON"
             android:textColor="#FFFFFF"
             android:textSize="10dp" />

         <TextView
             android:id="@+id/TextView01"
             android:layout_width="120dp"
             android:layout_height="120dp"
             android:layout_alignTop="@+id/num_txt"
             android:layout_toRightOf="@+id/num_txt"
             android:background="@drawable/bg_red"
             android:gravity="center"
             android:text="My name is NON"
             android:textColor="#FFFFFF"
             android:textSize="10dp" />

    </RelativeLayout>

ConstraintLayout用于徽章计数。

试试这个

    <?xml version="1.0" encoding="utf-8"?>
    <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content" >

        <RelativeLayout
            android:layout_width="wrap_content"
            android:layout_height="wrap_content" >

            <TextView
                android:id="@+id/num_txt"
                android:layout_width="100dp"
                android:layout_height="100dp"
                android:layout_marginTop="0dp"
                android:background="@drawable/bg_red"
                android:gravity="center"
                android:text="My name is NON"
                android:textColor="#FFFFFF"
                android:textSize="10dp" />

        </RelativeLayout>

    </RelativeLayout>

import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.util.AttributeSet;
import android.widget.TextView;

public class CircularTextView extends TextView
{
private float strokeWidth;
int strokeColor,solidColor;

public CircularTextView(Context context) {
    super(context);
}

public CircularTextView(Context context, AttributeSet attrs) {
    super(context, attrs);
}

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


@Override
public void draw(Canvas canvas) {

    Paint circlePaint = new Paint();
    circlePaint.setColor(solidColor);
    circlePaint.setFlags(Paint.ANTI_ALIAS_FLAG);

    Paint strokePaint = new Paint();
    strokePaint.setColor(strokeColor);
    strokePaint.setFlags(Paint.ANTI_ALIAS_FLAG);

    int  h = this.getHeight();
    int  w = this.getWidth();

    int diameter = ((h > w) ? h : w);
    int radius = diameter/2;

    this.setHeight(diameter);
    this.setWidth(diameter);

    canvas.drawCircle(diameter / 2 , diameter / 2, radius, strokePaint);

    canvas.drawCircle(diameter / 2, diameter / 2, radius-strokeWidth, circlePaint);

    super.draw(canvas);
}

public void setStrokeWidth(int dp)
{
    float scale = getContext().getResources().getDisplayMetrics().density;
    strokeWidth = dp*scale;

}

public void setStrokeColor(String color)
{
    strokeColor = Color.parseColor(color);
}

public void setSolidColor(String color)
{
    solidColor = Color.parseColor(color);

}
}

尝试使用此代码使用textview动态创建圆圈

RelativeLayout main_rel_layout = findViewById(R.id.main_rel_layout);
TextView textView = new TextView(this);
RelativeLayout relativeLayout = new RelativeLayout(this);
RelativeLayout.LayoutParams params = new RelativeLayout.LayoutParams(RelativeLayout.LayoutParams.WRAP_CONTENT, RelativeLayout.LayoutParams.WRAP_CONTENT);
params.addRule(RelativeLayout.CENTER_IN_PARENT);
textView.setText("Hello ");
textView.setTextSize(100);
textView.setLayoutParams(params);
textView.setGravity(Gravity.CENTER);

final FrameLayout frameLayout = new FrameLayout(this);
FloatingActionButton floatingActionButton = new FloatingActionButton(this);
floatingActionButton.setCustomSize(400);
frameLayout.addView(floatingActionButton);

relativeLayout.addView(frameLayout);
relativeLayout.addView(textView);
main_rel_layout.addView(relativeLayout);

谢谢，删除了额外的布局，但是它看起来仍然和我发布的图片一样，我会更新我的xml代码。你可以看到小圆圈必须靠近大圆圈。我没有在我的文本视图中设置任何可绘制的，那么我为什么要使用可绘制的填充？？它将如何帮助我？？为此，您需要创建自定义视图，并且在该onDraw（）方法中，您可以使用背景和文本绘制圆圈。@DeepchandSingh我通过XML实现了我的需求，您可以演示如何通过onDraw实现吗method@edwin如果您是通过XML实现的，那就太好了。如果您想尝试使用canvas，只需看看：您可以尝试将padding in-ve值添加到views@RDC谢谢你，而不是我给的利润率为负值，这有助于我实现我的目标needed@edwin这些答案中有一个对你有用吗？请接受！谢谢@Rachael我的问题是通过使用canvas编程实现它。但没有一个答案指出这一点

RelativeLayout main_rel_layout = findViewById(R.id.main_rel_layout);
TextView textView = new TextView(this);
RelativeLayout relativeLayout = new RelativeLayout(this);
RelativeLayout.LayoutParams params = new RelativeLayout.LayoutParams(RelativeLayout.LayoutParams.WRAP_CONTENT, RelativeLayout.LayoutParams.WRAP_CONTENT);
params.addRule(RelativeLayout.CENTER_IN_PARENT);
textView.setText("Hello ");
textView.setTextSize(100);
textView.setLayoutParams(params);
textView.setGravity(Gravity.CENTER);

final FrameLayout frameLayout = new FrameLayout(this);
FloatingActionButton floatingActionButton = new FloatingActionButton(this);
floatingActionButton.setCustomSize(400);
frameLayout.addView(floatingActionButton);

relativeLayout.addView(frameLayout);
relativeLayout.addView(textView);
main_rel_layout.addView(relativeLayout);