Android之TextView自适应大小

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activity_main.xml

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 Texttest
 Settings
 Hello world!
 text
 Normal:
 Autofit:
 This is an example

package com.example.texttest;
import android.app.Activity;
import android.os.Bundle;
import android.text.Editable;
import android.text.TextWatcher;
import android.view.Menu;
import android.widget.EditText;
import android.widget.TextView;
public class MainActivity extends Activity {
 private TextView mOutput;
 private TextView mAutofitOutput;
 @Override
 protected void onCreate(Bundle savedInstanceState) {
  super.onCreate(savedInstanceState);
  setContentView(R.layout.activity_main);
  mOutput = (TextView)findViewById(R.id.output);
  mAutofitOutput = (TextView)findViewById(R.id.output_autofit);
  ((EditText)findViewById(R.id.input)).addTextChangedListener(new TextWatcher() {
   @Override
   public void beforeTextChanged(CharSequence charSequence, int i, int i2, int i3) {
    // do nothing
   }
   @Override
   public void onTextChanged(CharSequence charSequence, int i, int i2, int i3) {
    mOutput.setText(charSequence);
    mAutofitOutput.setText(charSequence);
   }
   @Override
   public void afterTextChanged(Editable editable) {
    // do nothing
   }
  });
 }
 @Override
 public boolean onCreateOptionsMenu(Menu menu) {
  // Inflate the menu; this adds items to the action bar if it is present.
  getMenuInflater().inflate(R.menu.main, menu);
  return true;
 }
}

MainActivity.java