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1、demo的结构图
2、CustomFontPercedntTextView.java的代码
package com.example.propertyanimation; import android.content.Context; import android.util.AttributeSet; import android.widget.TextView; public class CustomFontPercedntTextView extends TextView { private int percentage; public CustomFontPercedntTextView(Context context, AttributeSet attrs, int defStyle) { super(context, attrs, defStyle); } public CustomFontPercedntTextView(Context context, AttributeSet attrs) { super(context, attrs); } public CustomFontPercedntTextView(Context context) { super(context); } public int getPercentage() { return percentage; } public void setPercentage(int percentage) { this.percentage = percentage; setText(percentage + "%"); } }
2、MainAcitivity.java的代码
package com.example.propertyanimation; import android.animation.AnimatorInflater; import android.animation.AnimatorSet; import android.animation.ObjectAnimator; import android.animation.PropertyValuesHolder; import android.app.Activity; import android.os.Bundle; import android.view.View; import android.view.animation.LinearInterpolator; import android.widget.TextView; public class MainActivity extends Activity { private CustomFontPercedntTextView tv_percentage; private TextView tv; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); tv = (TextView) findViewById(R.id.tv); } public void click(View view) { tv_percentage = (CustomFontPercedntTextView) this .findViewById(R.id.cftv); PropertyValuesHolder prvh = PropertyValuesHolder.ofInt("percentage", 30, 0, 70); ObjectAnimator anim = ObjectAnimator.ofPropertyValuesHolder( this.tv_percentage, prvh); anim.setDuration(5000); anim.setInterpolator(new LinearInterpolator()); anim.start(); AnimatorSet set = (AnimatorSet) AnimatorInflater.loadAnimator(this, R.animator.property_animator); set.setTarget(tv); set.start(); } }
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原文地址:http://www.cnblogs.com/fuyanan/p/4301735.html