自动调整TextView字体大小以适应文字长度&拖动一个角增大textView面积
效果是 当字数少的时候 字体最大，随着字数的增多字体逐渐减小。
public class EditTextClass extends Activity implements OnTouchListener { private EditText txt; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); txt = (EditText) findViewById(YourEditTextId); txt.setOnTouchListener(this); } @Override public boolean onTouch(View v, MotionEvent event) { if(event.getX() >= txt.getWidth() - 5 && event.getX() <= txt.getWidth() event.getY() >= txt.getHeight() - 5 && event.getY() <= txt.getHeight()) { txt.setWidth(event.getX()); txt.setHeight(event.getY()); } return true; }}