1.Dialog大小设置
继承Dialog
Window mwindow = this.getWindow();
WindowManager.LayoutParams lp = mwindow.getAttributes();
lp.x = 0;
lp.y = 0;
lp.height = 800;
lp.width = 800;
mwindow.setAttributes(lp);
lp.alpha = 0.0f; //能够控制添加到此Dialog中控件透明度
this.getWindow().setBackgroundDrawable(new ColorDrawable(0x00000000)); //Dialog背景控制没好使
2.Dialog其他
1.构造函数
MediaDialog继承Dialog
public MediaDialog(Context context) { // context 一般传Activity子类，在消息里new出新的Dialog
super(context);
}
2. Dialog对象.show()时调用
@Override
protectedvoid onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.media);
}
3.代码布局
Activity的子类
1.view添加
setContentView(view) //Activity的这个界面布局都被一个view占据
RelativeLayout.LayoutParams params = new RelativeLayout.LayoutParams(40, 40);
addContentView(view, params);//Activity上可以添加很多view
在xml里定义了控件就不用addContentView
2.view定位
RelativeLayout.LayoutParams params = new RelativeLayout.LayoutParams(80, 140); //宽、高
params.setMargins(10, 10, 10, 10);//作用未发现：原因自定义的无效要从xml中获取
params.leftMargin = 100;//作用未发现：原因自定义的无效要从xml中获取
3.Margin、padding
http://android.blog.51cto.com/268543/541832
4.图片按钮assets下获取图片资源
ImageView view = new ImageView(this);
AssetManager asm = getAssets();
InputStream is;
try {
is = asm.open("1.png");
Bitmap p_w_picpath = BitmapFactory.decodeStream(is);
Drawable drawable = newBitmapDrawable(p_w_picpath);
view.setImageBitmap(p_w_picpath);
} catch (IOException e1) {
e1.printStackTrace();
}
ImageView动态定位
RelativeLayout.LayoutParams params = new RelativeLayout.LayoutParams(100, 100);
params.setMargins((int) 100, (int) 100, (int) 0, (int) 0);
view.setLayoutParams(params);
监听事件
view.setOnClickListener(new View.OnClickListener() {
@Override
publicvoid onClick(View v) {
Toast.makeText(MainActivity.this, "大声道吗？ 是的，他",
Toast.LENGTH_SHORT).show();
}
});
5.显示文字的 TextView (label)
TextView textView = (TextView) findViewById(R.id.test);
textView.setText("打算打算");
textView.setTextSize(40);
textView.setBackgroundColor(Color.BLUE);
textView.setTextColor(Color.BLACK);
textView.setLayoutParams(params);
文字居中xml
android:gravity="center"
6.控件操作
隐藏
xxx.setVisibility(View.INVISIBLE);
7.警告框
AlertDialog.Builder bld = new AlertDialog.Builder(this);
bld.setMessage("提示");
bld.setNeutralButton("OK", null);
bld.create().show();
8.图片按钮
res/layout文件夹里的activity_main.xml
<ImageView
android:src="@drawable/upgrade_app"
android:id="@+id/upgrade_button"
android:onClick="onUpgradeAppButtonClicked"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginRight="20dp"/>
publicvoid onUpgradeAppButtonClicked(View arg0) {}
