安卓常用属性

1.透明的布局主题:android:theme="@android:style/Theme.Translucent.NoTitleBar"

2.异步线程的handler机制:
发起:
Message mg = Message.obtain();
mg.obj = "a1";
handler.sendMessage(mg);
接收:
private Handler handler = new Handler() {
@Override
public void handleMessage(Message msg) {
String m = (String) msg.obj;
System.out.println("m"+m);
if(m.equals("a1")){
finish();//执行消息接收后的方法
}
}
};

3.布局theme没有主题:@android:style/Theme.Light.NoTitleBar

4.禁止横屏:android:screenOrientation="portrait"

5.默认不选中edittext的光标:android:windowSoftInputMode="adjustPan|stateHidden"

6.listview与scrollview的冲突重组:
listview.setAdapter(adapter01);
setListViewHeightBasedOnChildren(listview);
在listview后面setadapter   加上setListViewHeightBasedOnChildren(listview);即可
//////////////////设置listview的高度
public void setListViewHeightBasedOnChildren(ListView listView) {
// 获取ListView对应的Adapter
ListAdapter listAdapter = listView.getAdapter();
if (listAdapter == null) {
return;
}

int totalHeight = 0;
for (int i = 0, len = listAdapter.getCount(); i < len; i++) {
// listAdapter.getCount()返回数据项的数目
View listItem = listAdapter.getView(i, null, listView);
// 计算子项View 的宽高
listItem.measure(0, 0);
// 统计所有子项的总高度
totalHeight += listItem.getMeasuredHeight();
}

ViewGroup.LayoutParams params = listView.getLayoutParams();
params.height = totalHeight+ (listView.getDividerHeight() * (listAdapter.getCount() - 1));
// listView.getDividerHeight()获取子项间分隔符占用的高度
// params.height最后得到整个ListView完整显示需要的高度
listView.setLayoutParams(params);
}

7.startactivityforresult启动activity的回调:
//启动回调
startActivityForResult(intent, 1001);
@Override
public void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
if (requestCode == 1001 && resultCode == Activity.RESULT_OK) {
Bundle bundle = data.getExtras();
System.out.println("str:"+bundle.get("str"));
}
}
//返回带参
Intent intent=getIntent();
intent.putExtra("str", "abcd");
setResult(Activity.RESULT_OK,intent);
finish();

8.adapter 的继承
public class Fanli_adapter extends BaseAdapter{

private Context context;
private List<Map<String, String>>list= new ArrayList<Map<String,String>>();

public Fanli_adapter(Context context, List<Map<String, String>> list) {
this.context=context;
this.list=list;
}

@Override
public int getCount() {
return list.size();
}

@Override
public Object getItem(int position) {
return list.get(position);
}

@Override
public long getItemId(int position) {
return position;
}

@Override
public View getView(int position, View convertView, ViewGroup parent) {
ViewHolder holder;
if(convertView==null){
convertView=View.inflate(context, R.layout.item_activity_fg5_fan_li, null);
holder=new ViewHolder();
holder.tv1=(TextView) convertView.findViewById(R.id.item_fanli_img1);
convertView.setTag(holder);
}else{
holder=(ViewHolder) convertView.getTag();
}
holder.tv1.setText((String)(list.get(position).get("1")));
return convertView;
}

class ViewHolder{
TextView tv1;
}
}

9.xml内容/边线/弧角
<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android" >
<solid android:color="#ffffff"  />

<stroke
android:width="3dp"
android:color="@null" />

<corners
android:topLeftRadius="25dp"
android:topRightRadius="25dp"
android:bottomLeftRadius="25dp"
android:bottomRightRadius="25dp"
/>

</shape>

10.textview两行显示
android:maxLines="2"
android:ellipsize="end"

11.listview和gridview不选中的黄色背景
android:listSelector="@android:color/transparent"

12.加载的布局
//加载的布局
private View add_view(){
LayoutInflater inflater = LayoutInflater.from(this);
View view = inflater.inflate(R.layout.aitem, null);
return view;
}

13.配合translate主题使用的activity的动画效果
overridePendingTransition(R.anim.ap2, R.anim.ap1);// 淡出淡入动画效果
anim.ap1:
<set xmlns:android="http://schemas.android.com/apk/res/android" >
<!-- fromAlpha:开始时透明度；toAlpha：结束时透明度；duration：动画持续时间 -->
<alpha
android:duration="100"
android:fromAlpha="1.0"
android:toAlpha="0.0" />
</set>
anim.ap2:
<set xmlns:android="http://schemas.android.com/apk/res/android" >
<alpha
android:duration="100"
android:fromAlpha="0.0"
android:toAlpha="1.0" />

</set>