android获取屏幕像素思路及代码

<SPAN style="FONT-SIZE: 18px">private void alertScreenDialog() { 
DisplayMetrics dm = new DisplayMetrics(); 
getWindowManager().getDefaultDisplay().getMetrics(dm); 
String optStr = "手机屏幕分辨率为: "+dm.widthPixels+" x "+dm.heightPixels; 
Builder builder = new Builder(this); 
builder.setMessage(optStr); 
builder.setIcon(R.drawable.firefox); 
builder.setTitle("获取屏幕像素"); 
//点击确定按钮 
builder.setPositiveButton("确定", new DialogInterface.OnClickListener(){ 
@Override 
public void onClick(DialogInterface dialog, int which) { 
Toast.makeText(GetScreenActivity.this, "获取到像素", Toast.LENGTH_LONG).show(); 
} 
}); 
builder.setNegativeButton("返回", new DialogInterface.OnClickListener() { 
@Override 
public void onClick(DialogInterface dialog, int which) { 
Toast.makeText(GetScreenActivity.this, "返回", Toast.LENGTH_LONG).show(); 
} 
}); 
builder.create().show(); 
}</SPAN>