Android TextView 设置字体大小的方法

package com.example.yanlei.yl4;import android.graphics.Color;import android.os.Bundle;import android.support.v7.app.AppCompatActivity;import android.text.Spannable;import android.text.style.AbsoluteSizeSpan;import android.text.style.BackgroundColorSpan;import android.text.style.StyleSpan;import android.view.Menu;import android.view.MenuItem;import android.view.View;import android.widget.Button;import android.widget.EditText;import android.widget.TextView;public class MainActivity extends AppCompatActivity {TextView edit;Button sendBu;@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_main);edit = (TextView) findViewById(R.id.textView);sendBu = (Button) findViewById(R.id.button);sendBu.setOnClickListener(new ButtonClickListener());}private class ButtonClickListener implements View.OnClickListener {public void onClick(View v) {//System.exit(0);edit.setText("闫磊我爱你");edit.setTextColor(Color.BLUE);edit.setText("这是我的第一个TextView，嘿嘿", TextView.BufferType.EDITABLE);/*** 要设置文本的背景色，* 必须将文本设置成BufferType.SPANNABLE,BufferType.EDITABLE*/Spannable sp = (Spannable) edit.getText();//设置红色背景sp.setSpan(new BackgroundColorSpan(Color.RED), 3, 8,Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);sp.setSpan(new StyleSpan(android.graphics.Typeface.BOLD_ITALIC),0, 7, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE); //设置斜体sp.setSpan(new AbsoluteSizeSpan(80), 0, 2, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE); //设置字体大小edit.setText(sp);//edit.setHeight(60);//android.os.Process.killProcess(android.os.Process.myPid());}}@Overridepublic boolean onCreateOptionsMenu(Menu menu) {// Inflate the menu; this adds items to the action bar if it is present.getMenuInflater().inflate(R.menu.menu_main, menu);return true;}@Overridepublic boolean onOptionsItemSelected(MenuItem item) {// Handle action bar item clicks here. The action bar will// automatically handle clicks on the Home/Up button, so long// as you specify a parent activity in AndroidManifest.xml.int id = item.getItemId();//noinspection SimplifiableIfStatementif (id == R.id.action_settings) {return true;}return super.onOptionsItemSelected(item);}}