helloWorld

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private TextView tv_init;

@override

protected void onCreate(Bundle saveInstanceState){

　supper.onCreate(saveInstanceState);

　setContentView(R.layout.activity_init);

   tv_init=(TextView)findViewById(R.id.xxxx);

   tv_init.setTextSize(dpToPixels(tv_init.getContext(),30f));

   tv_init.setOnClickListener(new OnClickListener(){

    @override

    public void onClick(View arg0) {v_init.setTextColor(Color.rgb(232,21,23)}

   })

　/*dp方法*/

  public static int dpToPixels(Context context, float dp) {
     final float scale = context.getResources().getDisplayMetrics().density;
     return (int) (dp * scale + 0.5f);
 }

}

helloWorld

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原文地址：http://www.cnblogs.com/aiwoqu/p/4474289.html