notifyDataSetChanged 来更新的，因为SimpleAdapter 主要是用来创建静态的数据的列表，如果要实现动态更新数据，需要自己定义一个基于BaseAdapter的adapter，然后通过notifyDataSetChanged 来更新list。SimpleAdapater isn't built for use with data that changes; it handles static data only. If you can't use an ArrayAdapter because your data has more than a single bit of text, then you will either have to build your own custom ListAdapter, or put your data in a DB and use one of the CursorAdapters.import android.content.Context;import android.view.LayoutInflater;import android.view.View;import android.view.ViewGroup;import android.widget.BaseAdapter;import android.widget.ImageButton;import android.widget.ImageView;import android.widget.TextView; import java.util.ArrayList;import java.util.HashMap; public class lvButtonAdapter extends BaseAdapter { private class buttonViewHolder { ImageView appIcon; TextView appName; ImageButton buttonClose; } private ArrayListObject>> mAppList; private LayoutInflater mInflater; private Context mContext; private String[] keyString; private int[] valueViewID; private buttonViewHolder holder;,
@Overridepublic boolean onKeyDown(int keyCode, KeyEvent event) { if (keyCode == KeyEvent.KEYCODE_BACK && this.getTitle().equals("") ) { // 創建退出對話框 AlertDialog.Builder d = new AlertDialog.Builder(this) .setMessage("確定要退出嗎") .setCancelable(false); d.setPositiveButton("確定", new DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface dialog, int which) { finish(); } }); d.setNegativeButton("取消", new DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface dialog, int which) { } }); d.show(); }else if(keyCode == KeyEvent.KEYCODE_DEL){ }else{ finish(); } return false;}
android:textStyle="bold"
以下的例子是實際上可能會看得到的排版，介紹如下：
xml version="1.0" encoding="utf-8"?>xmlns:android="http://schemas.android.com/apk/res/android" xmlns:app="http://schemas.android.com/apk/res-auto" android:layout_width="match_parent" android:orientation="horizontal" android:paddingBottom="10dp" android:background="#BBBBBB" android:layout_height="150dp">
Intent intent=new Intent(this, PhotoDetail.class);intent.putExtra("photo", MainActivity.contactTemp.getPhoto() );this.startActivity(intent);
Uri imgUri=Uri.parse("file://" + getIntent().getStringExtra("photo"));
startActivityForResult(new Intent(MainActivity.this, AddNotes.class), 1);
protected void onActivityResult(int requestCode, int resultCode, Intent data) { super.onActivityResult(requestCode, resultCode, data); if (resultCode == RESULT_OK) { Bundle bundleResult = data.getExtras(); String photo = bundleResult.getString("photo").toString(); } }
android:name=".PhotoDetail"> Intent it = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);startActivityForResult(it,100);startActivityForResult(it,100);
android:onClick="onClick" android:orientation="vertical" android:layout_width="fill_parent" android:layout_height="fill_parent" ><TextView android:layout_width="fill_parent" android:layout_height="wrap_content" android:text="@string/hello" /><Button android:layout_width="fill_parent" android:layout_height="wrap_content" android:text="Click Me" android:onClick="onClick" /></LinearLayout> |
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| package com.AndroidOnClick;import android.app.Activity;import android.os.Bundle;import android.view.View;import android.widget.Toast;public class AndroidOnClickActivity extends Activity { /** Called when the activity is first created. */ @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); } public void onClick(View view){ Toast.makeText(AndroidOnClickActivity.this, "Button Clicked", Toast.LENGTH_LONG).show(); }} |