九宫格使用

    <!--android:numColumns指定列数  -->
    <!-- android:verticalSpacing="10dp"指定内部条目竖直方向间距为10dp -->
    <GridView
        android:id="@+id/gv_home"
        android:numColumns="3"
        android:verticalSpacing="10dp"
        android:layout_width="match_parent"
        android:layout_height="match_parent" >
    </GridView>

public class HomeActivity extends Activity {
    private GridView gv_home;
    private String[] mTitleStrs;
    private int[] mDrawableIds;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_home);
        
        initUI();
        //初始化数据的方法
        initData();
    }

    private void initData() {
        //准备数据(文字(9组),图片(9张))
        mTitleStrs = new String[]{
                "手机防盗","通信卫士","软件管理","进程管理","流量统计","手机杀毒","缓存清理","高级工具","设置中心"
        };
        
        mDrawableIds = new int[]{
                R.drawable.home_safe,R.drawable.home_callmsgsafe,
                R.drawable.home_apps,R.drawable.home_taskmanager,
                R.drawable.home_netmanager,R.drawable.home_trojan,
                R.drawable.home_sysoptimize,R.drawable.home_tools,R.drawable.home_settings
        };
        //九宫格控件设置数据适配器(等同ListView数据适配器)
        gv_home.setAdapter(new MyAdapter());
        //注册九宫格单个条目点击事件
        gv_home.setOnItemClickListener(new OnItemClickListener() {
            //点中列表条目索引position
            @Override
            public void onItemClick(AdapterView<?> parent, View view,int position, long id) {
                switch (position) {
                case 0:
                    //开启对话框
                    showDialog();
                    break;
                case 8:
                    Intent intent = new Intent(getApplicationContext(),SettingActivity.class);
                    startActivity(intent);
                    break;
                }
            }
        });
    }

    protected void showDialog() {
        //判断本地是否有存储密码(sp    字符串)
        String psd = SpUtil.getString(this, ConstantValue.MOBILE_SAFE_PSD, "");
        if(TextUtils.isEmpty(psd)){
            //1,初始设置密码对话框
            showSetPsdDialog();
        }else{
            //2,确认密码对话框
            showConfirmPsdDialog();
        }
    }

    /**
     * 确认密码对话框
     */
    private void showConfirmPsdDialog() {

        //因为需要去自己定义对话框的展示样式,所以需要调用dialog.setView(view);
        //view是由自己编写的xml转换成的view对象xml----->view
        Builder builder = new AlertDialog.Builder(this);
        final AlertDialog dialog = builder.create();
        
        final View view = View.inflate(this, R.layout.dialog_confirm_psd, null);
        //让对话框显示一个自己定义的对话框界面效果
        dialog.setView(view);
        dialog.show();
        
        Button bt_submit = (Button) view.findViewById(R.id.bt_submit);
        Button bt_cancel = (Button) view.findViewById(R.id.bt_cancel);
        
        bt_submit.setOnClickListener(new OnClickListener() {
            @Override
            public void onClick(View v) {
                EditText et_confirm_psd = (EditText)view.findViewById(R.id.et_confirm_psd);
                
                String confirmPsd = et_confirm_psd.getText().toString();
                
                if(!TextUtils.isEmpty(confirmPsd)){
                    String psd = SpUtil.getString(getApplicationContext(), ConstantValue.MOBILE_SAFE_PSD, "");
                    if(psd.equals(confirmPsd)){
                        //进入应用手机防盗模块,开启一个新的activity
                        Intent intent = new Intent(getApplicationContext(), TestActivity.class);
                        startActivity(intent);
                        //跳转到新的界面以后需要去隐藏对话框
                        dialog.dismiss();
                    }else{
                        ToastUtil.show(getApplicationContext(),"确认密码错误");
                    }
                }else{
                    //提示用户密码输入有为空的情况
                    ToastUtil.show(getApplicationContext(), "请输入密码");
                }
            }
        });
        
        bt_cancel.setOnClickListener(new OnClickListener() {
            @Override
            public void onClick(View v) {
                dialog.dismiss();
            }
        });
    
    }
    /**
     * 设置密码对话框
     */
    private void showSetPsdDialog() {
        //因为需要去自己定义对话框的展示样式,所以需要调用dialog.setView(view);
        //view是由自己编写的xml转换成的view对象xml----->view
        Builder builder = new AlertDialog.Builder(this);
        final AlertDialog dialog = builder.create();
        
        final View view = View.inflate(this, R.layout.dialog_set_psd, null);
        //让对话框显示一个自己定义的对话框界面效果
        dialog.setView(view);
        dialog.show();
        
        Button bt_submit = (Button) view.findViewById(R.id.bt_submit);
        Button bt_cancel = (Button) view.findViewById(R.id.bt_cancel);
        
        bt_submit.setOnClickListener(new OnClickListener() {
            @Override
            public void onClick(View v) {
                EditText et_set_psd = (EditText) view.findViewById(R.id.et_set_psd);
                EditText et_confirm_psd = (EditText)view.findViewById(R.id.et_confirm_psd);
                
                String psd = et_set_psd.getText().toString();
                String confirmPsd = et_confirm_psd.getText().toString();
                
                if(!TextUtils.isEmpty(psd) && !TextUtils.isEmpty(confirmPsd)){
                    if(psd.equals(confirmPsd)){
                        //进入应用手机防盗模块,开启一个新的activity
                        Intent intent = new Intent(getApplicationContext(), TestActivity.class);
                        startActivity(intent);
                        //跳转到新的界面以后需要去隐藏对话框
                        dialog.dismiss();
                        
                        SpUtil.putString(getApplicationContext(), ConstantValue.MOBILE_SAFE_PSD, psd);
                    }else{
                        ToastUtil.show(getApplicationContext(),"确认密码错误");
                    }
                }else{
                    //提示用户密码输入有为空的情况
                    ToastUtil.show(getApplicationContext(), "请输入密码");
                }
            }
        });
        
        bt_cancel.setOnClickListener(new OnClickListener() {
            @Override
            public void onClick(View v) {
                dialog.dismiss();
            }
        });
    }

    private void initUI() {
        gv_home = (GridView) findViewById(R.id.gv_home);
    }
    
    class MyAdapter extends BaseAdapter{
        @Override
        public int getCount() {
            //条目的总数    文字组数 == 图片张数
            return mTitleStrs.length;
        }

        @Override
        public Object getItem(int position) {
            return mTitleStrs[position];
        }

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

        @Override
        public View getView(int position, View convertView, ViewGroup parent) {
            View view = View.inflate(getApplicationContext(), R.layout.gridview_item, null);
            TextView tv_title = (TextView) view.findViewById(R.id.tv_title);
            ImageView iv_icon = (ImageView) view.findViewById(R.id.iv_icon);
            
            tv_title.setText(mTitleStrs[position]);
            iv_icon.setBackgroundResource(mDrawableIds[position]);
            
            return view;
        }
    }
}

GridView使用,和ListView使用方式类似