import android.content.res.Resources;import android.graphics.Color;import android.graphics.drawable.Drawable;import android.os.Bundle;import android.support.v7.app.ActionBarActivity;import android.view.Menu;import android.view.MenuItem;import android.widget.TextView;import  android.util.DisplayMetrics;import java.util.ResourceBundle;public class TestMain extends ActionBarActivity {    private TextView mTextView01;    private  TextView mTextView02;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_test_main);        mTextView01 = (TextView) findViewById(R.id.myTextView01);        mTextView01.setText("屏幕分辨率");        mTextView01.setTextColor(Color.GREEN);       //字体颜色        mTextView01.setBackgroundColor(Color.WHITE); //背景色        DisplayMetrics dm = new DisplayMetrics();    //获取屏幕分辨率        getWindowManager().getDefaultDisplay().getMetrics(dm);        String str_2 = "分辨率大小为" + dm.widthPixels + "*" + dm.heightPixels;        mTextView02 = (TextView) findViewById(R.id.myTextView02);        mTextView02.setText(str_2);    }

setBackgroundXXX的用处，设置这个View背景。

setBackgroundDrawable 的参数为Drawable对象，

setBackgroundColor 的参数为Color对象，比如说Color.Red为红色，或Color.rgb(255,0,0) 来制定一个红色

setBackgroundResource 的参数为资源ID，比如说R.drawable.icon

setBackground用法如上

import android.content.res.Resources; import android.graphics.Color; import android.graphics.drawable.Drawable; import android.os.Bundle; import android.support.v7.app.ActionBarActivity; import android.view.Menu; import android.view.MenuItem; import android.widget.TextView; import  android.util.DisplayMetrics; import java.util.ResourceBundle; public class TestMain extends ActionBarActivity {
  private TextView mTextView01; private  TextView mTextView02; @Override protected void onCreate(Bundle savedInstanceState) {
  super.onCreate(savedInstanceState);         setContentView(R.layout.activity_test_main); mTextView01 = (TextView) findViewById(R.id.myTextView01); mTextView01.setText("屏幕分辨率"); mTextView01.setTextColor(Color.GREEN);       //字体颜色 mTextView01.setBackgroundColor(Color.WHITE); //背景色 DisplayMetrics dm = new DisplayMetrics();    //获取屏幕分辨率 getWindowManager().getDefaultDisplay().getMetrics(dm);         String str_2 = "分辨率大小为" + dm.widthPixels + "*" + dm.heightPixels; mTextView02 = (TextView) findViewById(R.id.myTextView02); mTextView02.setText(str_2);     }