仿余额宝动态数字显示收益

功能：仿余额宝动态数字显示收益

效果图：

 

主要实现代码：

package com.example.zzatest;
 
 
import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.view.Window;
import android.widget.Button;
 
public class MainActivity extends Activity {
     
     private MagicTextView mIncomeTxt;
     private Button button1;//动态显示值
     private Button button2;//归0
 
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        this.requestWindowFeature(Window.FEATURE_NO_TITLE);//去掉标题栏
        setContentView(R.layout.activity_main);
        mIncomeTxt = (MagicTextView) findViewById(R.id.income_money);
        button1=(Button) findViewById(R.id.button1);
        button2=(Button) findViewById(R.id.button2);
        mIncomeTxt.setValue(20,30);// mRate = (double)(20/50);
        button1.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                mIncomeTxt.beginShowValue();
            }
        });
        button2.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                mIncomeTxt.BackZero();
            }
        });
    }
 
}

 

package com.example.zzatest;
 
import java.math.BigDecimal;
import java.text.DecimalFormat;
 
import android.content.Context;
import android.os.Handler;
import android.os.Message;
import android.util.AttributeSet;
import android.widget.TextView;
 
 
public class MagicTextView extends TextView  {
     
    // 递减/递增 的变量值
    private double mRate;
    // view 设置的值
    private double mValue;
    // 当前显示的值
    private double mCurValue;
    // 当前变化后最终状态的目标值
    private double mGalValue;
    // 控制加减法
    private int rate = 1;
    // 偏移量 主要用来进行校正距离。
    DecimalFormat fnum = new DecimalFormat("0.00");
     
    public MagicTextView(Context context, AttributeSet attrs) {
        super(context, attrs);
    }
    private Handler mHandler = new Handler() {
        public void handleMessage(android.os.Message msg) {
            switch (msg.what) {
                case 0:
                    if (rate * mCurValue < mGalValue) {
                        setText(fnum.format(mCurValue));
                        mCurValue += mRate * rate;
                        mHandler.sendEmptyMessageDelayed(0, 50);
                    } else {
                        setText(fnum.format(mGalValue));
                    }
                    break;
                default:
                    break;
            }
        };
    };
 
    /**
     * 设置要显示的值
     * @param value
     */
    public void setValue(double value,int size) {
        mValue = value;
        //设定递增或递减比例
        mRate = (double) (mValue / size);
        BigDecimal b = new BigDecimal(mRate);
        mRate = b.setScale(2, BigDecimal.ROUND_HALF_UP).doubleValue();
    }
    /**
     * 动态的展现设定值
     */
    public void beginShowValue(){
        rate = 1;//表示增加
        //mCurValue = 0;
        mGalValue = mValue;
        mHandler.sendEmptyMessage(0);
    }
    /**
     * 动态归0
     */
    public void BackZero(){
        rate = -1;//表示减少
        //mCurValue=mValue;
        mGalValue = 0;
        mHandler.sendEmptyMessage(0);
    }
  
}

 

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".MainActivity" >
 
    <LinearLayout
        android:id="@+id/linearLayout1"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:background="#ff6633"
        android:orientation="vertical"
        android:padding="15dp" >
 
        <TextView
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:text="昨日收益"
            android:textColor="#FFFFFF"
            android:textSize="20sp" />
 
        <com.example.zzatest.MagicTextView
            android:id="@+id/income_money"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_marginTop="15dp"
            android:text="0.00"
            android:textColor="#FFFFFF"
            android:textSize="60sp" />
    </LinearLayout>
 
    <Button
        android:id="@+id/button1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentLeft="true"
        android:layout_below="@+id/linearLayout1"
        android:text="开始变化" />
 
    <Button
        android:id="@+id/button2"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignBaseline="@+id/button1"
        android:layout_alignBottom="@+id/button1"
        android:layout_toRightOf="@+id/button1"
        android:text="开始归0" />
 
</RelativeLayout>