废话不多说了，直接给大家贴代码了，具体代码如下所示：

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; @Override protected 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()); } } @Override public 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; } @Override public 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 SimplifiableIfStatement if (id == R.id.action_settings) { return true; } return super.onOptionsItemSelected(item); } }

以上代码内容是小编给大家分享的Android TextView 设置字体大小的方法，希望对大家有所帮助。