android textview背景渐变,android Textview颜色渐变

1.在代码中设置：

TextView mText = (TextView) findViewById(R.id.text);

LinearGradient mLinearGradient = new LinearGradient(0, 0, 0, mText.getPaint().getTextSize(), Color.WHITE, Color.BLACK, Shader.TileMode.CLAMP);

mText.getPaint().setShader(mLinearGradient);

2.自定义控件：

package com.leigo.demo.view;

import android.content.Context;

import android.graphics.Color;

import android.graphics.LinearGradient;

import android.graphics.Shader;

import android.util.AttributeSet;

import android.widget.TextView;

/**

* Created by Administrator on 2014/9/9.

*/

public class GradientTextView extends TextView {

public GradientTextView(Context context) {

super(context);

}

public GradientTextView(Context context,

AttributeSet attrs) {

super(context, attrs);

}

public GradientTextView(Context context,

AttributeSet attrs, int defStyle) {

super(context, attrs, defStyle);

}

@Override

protected void onLayout(boolean changed,

int left, int top, int right, int bottom) {

super.onLayout(changed, left, top, right, bottom);

if (changed) {

getPaint().setShader(new LinearGradient(

0, 0, 0, getHeight(),

Color.WHITE, Color.BLACK,

Shader.TileMode.CLAMP));

}

}

}

android:layout_width="match_parent"

android:layout_height="match_parent"

android:gravity="center"

android:orientation="vertical">

android:id="@+id/text"

android:text="@string/hello_world"

android:textSize="20sp"

android:layout_width="wrap_content"

android:layout_height="wrap_content" />