gridview主要用于對某些安卓界面的簡單布局使用，通過添加監聽事件來對gridview的每一個模塊的點擊進行處理，
GrideView和ListView類似，都需要setAdapter同時創建HomeAdapter來繼承BaseAdapter來進行逐一填充
布局檔案，創建一個3列的布局
<GridView
android:id="@+id/gv_home"
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight="1"
android:verticalSpacing="10dp"
android:numColumns="3"
></GridView>對GradView添加監聽事件
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_home);
gv_home = (GridView) findViewById(R.id.gv_home);
gv_home.setAdapter(new HomeAdapter());
//監聽gridview點擊事件
gv_home.setOnItemClickListener(new OnItemClickListener(){
@Override
public void onItemClick(AdapterView<?> parent, View view,
int position, long id) {
switch(position){
case 8:
//設定中心
startActivity(new Intent(HomeActivity.this, SettingActivity.class));
break;
default:
break;
}
}
});
}
GrideView的使用
首先創建布局檔案
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >
<TextView
style="@style/TitleStyle"
android:text="手機管家"
/>
<com.ldw.safe.view.FocusedTextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:textColor="@color/black"
android:text="簡書是一個優質的創作社區,在這里,你可以任性地創作,一篇短文、一張照片、一首詩、一幅畫……我們相信,每個人都是生活中的藝術家,有著無窮的創造力"
android:singleLine="true"
android:ellipsize="marquee"
android:layout_marginTop="3dp"
android:layout_marginBottom="3dp"
android:textSize="18sp"
/>
<GridView
android:id="@+id/gv_home"
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight="1"
android:verticalSpacing="10dp"
android:numColumns="3"
></GridView>
</LinearLayout>GrideView的單個條目
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:gravity="center"
android:orientation="vertical" >
<ImageView
android:id="@+id/iv_item"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:src="@drawable/app"
/>
<TextView
android:id="@+id/tv_item"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="手機衛士"
android:textColor="@color/black"
android:layout_marginTop="5dp"
android:textSize="18sp"
/>
</LinearLayout>邏輯代碼，將單個條目逐一填充在GrideView中
package com.ldw.safe.Activity;
import android.app.Activity;
import android.app.AlertDialog;
import android.content.Intent;
import android.content.SharedPreferences;
import android.os.Bundle;
import android.text.TextUtils;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.ViewGroup;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.BaseAdapter;
import android.widget.Button;
import android.widget.EditText;
import android.widget.GridView;
import android.widget.ImageView;
import android.widget.TextView;
import android.widget.Toast;
import com.ldw.safe.R;
import com.ldw.safe.utils.MD5Utils;
public class HomeActivity extends Activity{
private GridView gv_home;
private String[] mItems = new String[] {"手機防盜", "通訊衛士", "軟體管理", "行程管理", "流量統計", "手機殺毒", "快取清理", "高級工具", "設定中心"};
private int[] mPics = new int[] {R.drawable.safe, R.drawable.callmsgsafe, R.drawable.app,
R.drawable.taskmanager, R.drawable.netmanager, R.drawable.sysoptimize,
R.drawable.trojan, R.drawable.atools, R.drawable.settings};
private SharedPreferences mPref;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_home);
mPref = getSharedPreferences("config", MODE_PRIVATE);
gv_home = (GridView) findViewById(R.id.gv_home);
gv_home.setAdapter(new HomeAdapter());
//監聽gridview點擊事件
gv_home.setOnItemClickListener(new OnItemClickListener(){
@Override
public void onItemClick(AdapterView<?> parent, View view,
int position, long id) {
switch(position){
case 0:
//手機防盜
showPasswordDialog();
break;
case 1:
//通訊衛士
startActivity(new Intent(HomeActivity.this, CallSafeActivity.class));
break;
case 2:
//軟體管理
startActivity(new Intent(HomeActivity.this, AppManagerActivity.class));
break;
case 3:
//行程管理
startActivity(new Intent(HomeActivity.this, TaskManagerActivity.class));
break;
case 5:
//手機殺毒
startActivity(new Intent(HomeActivity.this, AntivirusActivity.class));
break;
case 7:
//高級工具
startActivity(new Intent(HomeActivity.this, AdvancedToolsActivity.class));
break;
case 8:
//設定中心
startActivity(new Intent(HomeActivity.this, SettingActivity.class));
break;
default:
break;
}
}
});
}
/*
* 顯示密碼的彈窗
*/
protected void showPasswordDialog(){
//判斷是否設定密碼
String savePassword = mPref.getString("password", null);
if(!TextUtils.isEmpty(savePassword)){
//輸入密碼的彈窗
showPasswordInputDialog();
}else{
//如果沒有設定過，彈出密碼設定的彈窗
showPasswordSetDialog();
}
}
/*
* 輸入密碼框，設定過密碼只需要登陸
*/
protected void showPasswordInputDialog(){
AlertDialog.Builder builder = new AlertDialog.Builder(this);
final AlertDialog dialog = builder.create();
View view = View.inflate(this, R.layout.dialog_input_password, null);
//dialog.setView(view);//自定義的view設定到dialog
dialog.setView(view, 0, 0, 0, 0);//設定邊距為0，兼容android2.3
final EditText etPassword = (EditText) view.findViewById(R.id.et_password);
//獲取2個按鍵
Button btnOk = (Button)view.findViewById(R.id.btn_ok);
Button btnCancle = (Button)view.findViewById(R.id.btn_cancle);
//監聽ok按鍵
btnOk.setOnClickListener(new OnClickListener(){
@Override
public void onClick(View v) {
String password = etPassword.getText().toString();
if(!TextUtils.isEmpty(password)){
String savePassword = mPref.getString("password", null);
if(MD5Utils.encode(password).equals(savePassword)){
Toast.makeText(HomeActivity.this, "登陸成功", Toast.LENGTH_SHORT).show();
//對話框消失
dialog.dismiss();
//跳轉到手機防盜界面
startActivity(new Intent(HomeActivity.this, LostAndFind.class));
}else{
Toast.makeText(HomeActivity.this, "登陸失敗", Toast.LENGTH_SHORT).show();
}
}else{
Toast.makeText(HomeActivity.this, "輸入框不能是空的", Toast.LENGTH_SHORT).show();
}
}
});
//監聽取消按鍵
btnCancle.setOnClickListener(new OnClickListener(){
@Override
public void onClick(View v) {
dialog.dismiss();
}
});
dialog.show();
}
/*
* 設定密碼的彈窗,以前沒有設定密碼
*/
protected void showPasswordSetDialog(){
AlertDialog.Builder builder = new AlertDialog.Builder(this);
final AlertDialog dialog = builder.create();
View view = View.inflate(this, R.layout.dialog_set_password, null);
//dialog.setView(view);//自定義的view設定到dialog
dialog.setView(view, 0, 0, 0, 0);//設定邊距為0，兼容android2.3
final EditText etPassword = (EditText) view.findViewById(R.id.et_password);
final EditText etPasswordConfirm = (EditText) view.findViewById(R.id.et_password_confirm);
//獲取2個按鍵
Button btnOk = (Button)view.findViewById(R.id.btn_ok);
Button btnCancle = (Button)view.findViewById(R.id.btn_cancle);
//監聽ok按鍵
btnOk.setOnClickListener(new OnClickListener(){
@Override
public void onClick(View v) {
String password = etPassword.getText().toString();
String passwordConfirm = etPasswordConfirm.getText().toString();
//TextUtils.isEmpty(password)判斷password是不是空，可以避免都是空格
if(!TextUtils.isEmpty(password) && !passwordConfirm.isEmpty()){
if(password.equals(passwordConfirm)){
Toast.makeText(HomeActivity.this, "登陸成功", Toast.LENGTH_SHORT).show();
//保存密碼到mPref
mPref.edit().putString("password", MD5Utils.encode(password)).commit();
//對話框消失
dialog.dismiss();
//跳轉到手機防盜界面
startActivity(new Intent(HomeActivity.this, LostAndFind.class));
}else{
Toast.makeText(HomeActivity.this, "兩次密碼不一致", Toast.LENGTH_SHORT).show();
}
}else{
Toast.makeText(HomeActivity.this, "輸入框不能是空的", Toast.LENGTH_SHORT).show();
}
}
});
//監聽取消按鍵
btnCancle.setOnClickListener(new OnClickListener(){
@Override
public void onClick(View v) {
dialog.dismiss();
}
});
dialog.show();
}
class HomeAdapter extends BaseAdapter{
@Override
public int getCount() {
// TODO Auto-generated method stub
return mItems.length;
}
@Override
public Object getItem(int position) {
// TODO Auto-generated method stub
return mItems[position];
}
@Override
public long getItemId(int position) {
// TODO Auto-generated method stub
return position;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
View view = View.inflate(HomeActivity.this, R.layout.home_list_item, null);
ImageView iv_item = (ImageView) view.findViewById(R.id.iv_item);
TextView tv_item = (TextView) view.findViewById(R.id.tv_item);
iv_item.setImageResource(mPics[position]);
tv_item.setText(mItems[position]);
return view;
}
}
}
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