手機安全衛士——主界面的開發

activity_home.xml home_list_item.xml style.xml color.xml HomeActivity.java 知識點： GirdView + BaseAdapter+點擊事件自定義TextView ...

activity_home.xml

<?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  
        android:id="@+id/text1"     
        style="@style/TitleStyle"
        android:text="功能列表" />

    //自定義TextView  強制有焦點
    <com.mxn.mobilesafe.view.FocusedTextView 
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:textColor="@color/black"
        android:textSize="22sp"
        android:text="新消息：  今日。。。。。"
        android:singleLine="true"  //展示一行  
        android:ellipsize="marquee"//走馬燈。。start省略前面的內容。。
        android:layout_marginTop="10dp"
        android:layout_marginBottom="10dp"       
        />
//給TextView加上這兩行代碼，也可以實現走馬燈
<!-- android:focusableInTouchMode="true" -->

<!-- android:focusable="true" -->



    <GridView
        android:id="@+id/gv_home"
        android:layout_width="match_parent"
        android:layout_height="0dp"
        android:layout_weight="1"
        android:verticalSpacing="30dp"
        android:numColumns="3" >//展示3列
    </GridView>

</LinearLayout>

FocusedTextView.java

//自定義TextView，獲取焦點的TextView
public class FocusedTextView extends TextView{

  //有style樣式的會走此方法
    public FocusedTextView(Context context, AttributeSet attrs, int defStyle) {
        super(context, attrs, defStyle);
        // TODO Auto-generated constructor stub
    }
  //有屬性時的會走此方法
    public FocusedTextView(Context context, AttributeSet attrs) {
        super(context, attrs);
        // TODO Auto-generated constructor stub
    }
   //用代碼new對象時走此方法
    public FocusedTextView(Context context) {
        super(context);
        // TODO Auto-generated constructor stub
    }
    
    @Override
    public boolean isFocused() {
        // 表示是否獲取焦點，走馬燈要運行，首先調用此函數，判斷是否有焦點，是true，走馬燈才會有效果。強制返回true
        return true;
    }

}

home_list_item.xml

<?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/home_apps" />
    

    <TextView
        android:id="@+id/tv_item"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginTop="20dp"
        android:textColor="@color/black"
        android:textSize="20sp"
        />

</LinearLayout>

style.xml

<resources>
<style name="TitleStyle">
        <item name="android:layout_width">match_parent</item>
        <item name="android:layout_height">100dp</item>
        <item name="android:background">#8866ff00</item>
        <item name="android:textColor">@color/black</item>
        <item name="android:gravity">center</item>
        <item name="android:textSize">22sp</item>
    </style>
</resources>

color.xml

<?xml version="1.0" encoding="utf-8"?>
<resources>
    <color name="black">#000</color>
    
</resources>

HomeActivity.java

public class HomeActivity extends Activity {

    private GridView gvHome;

    private String[] mItems = new String[] { "手機防盜", "通訊衛士", "軟體管理", "進程管理", "流量統計", "手機殺毒", "緩存清理", "高級工具", "設置中心" };

    private int[] mPics = 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 };

    private SharedPreferences mPref;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_home);

        mPref = getSharedPreferences("config", MODE_PRIVATE);

        gvHome = (GridView) findViewById(R.id.gv_home);
        gvHome.setAdapter(new HomeAdapter());

        // 設置每一項的監聽點擊事件
        gvHome.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 8:
                    // 設置中心
                    startActivity(new Intent(HomeActivity.this, SettingActivity.class));
                    break;
                case 7:
                    //高級工具
                    startActivity(new Intent(HomeActivity.this, AtoolsActivity.class));
                    break;
                case 1:
                    //通訊衛士，黑名單
                    startActivity(new Intent(HomeActivity.this,CallSafeActivity.class));
                    break;
                case 2:
                    //軟體管理
                    startActivity(new Intent(HomeActivity.this,AppManagerActivity.class));
                    break;
                case 3:
                    //進程管理
                    startActivity(new Intent(HomeActivity.this,TaskManagerActivity.class));
                    break;
                case 5:
                    //病毒查殺
                    startActivity(new Intent(HomeActivity.this,AntivirusActivity.class));
                    break;
                    
                case 6:
                    //緩存清理
                    startActivity(new Intent(HomeActivity.this,CleanCacheActivity.class));
                    break;
                    
                case 4:
                    //流量管理
                    startActivity(new Intent(HomeActivity.this,TrafficManagerActivity.class));
                default:
                    break;
                }
            }
        });
    }

    /**
     * 顯示密碼彈窗
     */
    protected void showPasswordDialog() {
        // 判斷是否設置密碼
        String savedPassword = mPref.getString("password", null);
        if (!TextUtils.isEmpty(savedPassword)) {
            // 輸入密碼彈窗
            showPasswordInputDialog();
        } else {
            // 如果沒有設置過, 彈出設置密碼的彈窗
            showPasswordSetDailog();
        }
    }

    /**
     * 輸入密碼彈窗
     */
    private 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);// 將自定義的佈局文件設置給dialog
        dialog.setView(view, 0, 0, 0, 0);// 設置邊距為0,保證在2.x的版本上運行沒問題

        final EditText etPassword = (EditText) view.findViewById(R.id.et_password);

        Button btnOK = (Button) view.findViewById(R.id.btn_ok);
        Button btnCancel = (Button) view.findViewById(R.id.btn_cancel);

        btnOK.setOnClickListener(new OnClickListener() {

            @Override
            public void onClick(View v) {
                String password = etPassword.getText().toString();

                if (!TextUtils.isEmpty(password)) {
                    String savedPassword = mPref.getString("password", null);

                    if (MD5Utils.encode(password).equals(savedPassword)) {
                        // Toast.makeText(HomeActivity.this, "登錄成功!",
                        // Toast.LENGTH_SHORT).show();
                        dialog.dismiss();

                        // 跳轉到手機防盜頁
                        startActivity(new Intent(HomeActivity.this, LostFindActivity.class));
                    } else {
                        Toast.makeText(HomeActivity.this, "密碼錯誤!", Toast.LENGTH_SHORT).show();
                    }
                } else {
                    Toast.makeText(HomeActivity.this, "輸入框內容不能為空!", Toast.LENGTH_SHORT).show();
                }
            }
        });

        btnCancel.setOnClickListener(new OnClickListener() {

            @Override
            public void onClick(View v) {
                dialog.dismiss();// 隱藏dialog
            }
        });

        dialog.show();
    }

    /**
     * 設置密碼的彈窗
     */
    private void showPasswordSetDailog() {
        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);// 將自定義的佈局文件設置給dialog
        dialog.setView(view, 0, 0, 0, 0);// 設置邊距為0,保證在2.x的版本上運行沒問題

        final EditText etPassword = (EditText) view.findViewById(R.id.et_password);
        final EditText etPasswordConfirm = (EditText) view.findViewById(R.id.et_confirm);

        Button btnOK = (Button) view.findViewById(R.id.btn_ok);
        Button btnCancel = (Button) view.findViewById(R.id.btn_cancel);

        btnOK.setOnClickListener(new OnClickListener() {
            @Override
            public void onClick(View v) {
                String password = etPassword.getText().toString();
                String passwordConfirm = etPasswordConfirm.getText().toString();
                // password!=null && !password.equals("")
                if (!TextUtils.isEmpty(password) && !passwordConfirm.isEmpty()) {
                    if (password.equals(passwordConfirm)) {
                        // Toast.makeText(HomeActivity.this, "登錄成功!",
                        // Toast.LENGTH_SHORT).show();

                        // 將密碼保存起來
                        mPref.edit().putString("password", MD5Utils.encode(password)).commit();
                        dialog.dismiss();
                        // 跳轉到手機防盜頁
                        startActivity(new Intent(HomeActivity.this, LostFindActivity.class));
                    } else {
                        Toast.makeText(HomeActivity.this, "兩次密碼不一致!", Toast.LENGTH_SHORT).show();
                    }
                } else {
                    Toast.makeText(HomeActivity.this, "輸入框內容不能為空!", Toast.LENGTH_SHORT).show();
                }
            }
        });

        btnCancel.setOnClickListener(new OnClickListener() {

            @Override
            public void onClick(View v) {
                dialog.dismiss();// 隱藏dialog
            }
        });

        dialog.show();
    }


    class HomeAdapter extends BaseAdapter {
        @Override
        public int getCount() {
            return mItems.length;//展示多少數據
        }

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

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

        @Override
        public View getView(int position, View convertView, ViewGroup parent) {
            //載入佈局
            View view = View.inflate(HomeActivity.this, R.layout.home_list_item, null);
            //獲取到每一項的具體內容
            ImageView ivItem = (ImageView) view.findViewById(R.id.iv_item);
            TextView tvItem = (TextView) view.findViewById(R.id.tv_item);
            //給girdview的每一項具體內容設置內容
            tvItem.setText(mItems[position]);
            ivItem.setImageResource(mPics[position]);
             //返回當前的position項
            return view;
        }

    }
}

dialog_set_password.xml

<?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
        android:id="@+id/textView1"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:gravity="center"
        android:background="#66ff6600"
        android:padding="20dp"
        android:textSize="20sp"
        android:text="設置密碼" />

    <EditText
        android:id="@+id/et_password"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:ems="10"
        android:hint="請輸入密碼"
        android:inputType="textPassword" >

        <requestFocus />
    </EditText>

    <EditText
        android:id="@+id/et_confirm"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:ems="10"
        android:hint="請再次輸入密碼"
        android:inputType="textPassword" />

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content" >

        <Button
            android:id="@+id/btn_ok"
            android:layout_weight="1"
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:text="確定" />

        <Button
            android:id="@+id/btn_cancel"
            android:layout_weight="1"
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:text="取消" />

    </LinearLayout>

</LinearLayout>

dialog_input_password.xml

<?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
        android:id="@+id/textView1"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:gravity="center"
        android:background="#66ff6600"
        android:padding="20dp"
        android:textSize="20sp"
        android:text="輸入密碼" />

    <EditText
        android:id="@+id/et_password"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:ems="10"
        android:hint="請輸入密碼"
        android:inputType="textPassword" >

        <requestFocus />
    </EditText>

   
    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content" >

        <Button
            android:id="@+id/btn_ok"
            android:layout_weight="1"
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:text="確定" />

        <Button
            android:id="@+id/btn_cancel"
            android:layout_weight="1"
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:text="取消" />

    </LinearLayout>

</LinearLayout>

MD5Utils.java

public class MD5Utils {
    
    public static String encode(String password){
        StringBuffer sb = new StringBuffer();
        MessageDigest instance;
        try {
            instance = MessageDigest.getInstance("MD5");
            byte[] digest = instance.digest(password.getBytes());//對字元串加密，返回加密後的位元組數組
            for(byte b:digest){
                int i = b&0xff;//獲取位元組的低八位有效值
                String hexString = Integer.toHexString(i);//將一個整數轉化為16進位
                System.out.println(hexString);
                
                if(hexString.length()<2){
                    hexString = "0"+hexString;
                }
                sb.append(hexString);
                return sb.toString();//MD5是32位的，返回加密後的字元串。。此演算法不可逆
            //MD5線上查詢破解  www.cmd5.com..只是對一些常用的密碼可以解密
            
        } }catch (NoSuchAlgorithmException e) {
            // TODO Auto-generated catch block
            //沒有該演算法時 拋出異常
            e.printStackTrace();
        }
        return "";        
}

    //獲取到文件的MD5
    public static String getFileMd5(String sourceDir) throws Exception {
        // TODO Auto-generated method stub
        File file = new File(sourceDir);
        StringBuffer sb = new StringBuffer();
        try {
            FileInputStream fis = new FileInputStream(file);
            byte[] buffer = new byte[1024];
            int len = -1;
            //獲取到數字摘要
            MessageDigest messageDigest = MessageDigest.getInstance("md5");
            
            while((len = fis.read(buffer)) != -1){
                messageDigest.update(buffer,0,len);
                
            }
            
            
            byte[]  result = messageDigest.digest();
            for(byte b:result){
                int i = b&0xff;
                String hexString = Integer.toHexString(i);
                System.out.println(hexString);
                
                if(hexString.length()<2){
                    hexString = "0"+hexString;
                }
                sb.append(hexString);
                
            
        } }catch (FileNotFoundException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
        
        return sb.toString();
    }}

知識點：

GirdView + BaseAdapter+點擊事件

自定義TextView