android刪除私密信息

主要思路：

1. 分析出短信數據庫結構，信息都存儲在mmssms.db中的sms表中。關鍵字段有:_id(短信序號)，body(短信內容)，thread_id(聯系人序號)，person(名字,但經常得到null)

while (cur.moveToNext()) {

String number=cur.getString(cur.getColumnIndex(“address”));//手機號

String name = cur.getString(cur.getColumnIndex(“person”));//聯系人姓名列表

String body = cur.getString(cur.getColumnIndex(“body”));//信息

String id=cur.getString(cur.getColumnIndex(“_id”));

2. 通過Pattern .Match 匹配關鍵字來檢索數據庫裡的信息，若匹配則獲取。

Pattern pattern=Pattern.compile(“.(驗證碼|密碼).“);

Matcher matcher=pattern.matcher(body);

3. 新信息到來時提醒並將信息顯示在頁面上：繼承ContentObserver 觀察者模式

@Override

public void onChange(boolean selfChange) {

super.onChange(selfChange);

super.onChange(selfChange);

//每當有新短信到來時，使用我們獲取短消息的方法

smsInfos=getSmsFromPhone();

adapter.notifyDataSetChanged();

//如何判斷是否private message?

Toast.makeText(MainActivity.this,”There have a new message!”,Toast.LENGTH_SHORT).show();

// Message message=new Message();

// message.what=1;

// message.obj=newSmsInfo;

// handler.sendMessage(message);

Log.i(SMS_MESSAGE,”correct”);

}

4. 刪除信息，再次讀取數據庫

while (position>=0) {

String id = smsInfos.get(position).getId();

//通過協議讀取mmssms.db ，不能直接讀取

Uri deleteUri = Uri.parse(“content://sms”);

getContentResolver().delete(deleteUri, “sms._id=?”, new String[]{id});

smsInfos.remove(position);

position = position - 1;

}

具體代碼：

? class MainActivity extends Activity {

private ListView showNote;

private Uri SMS_INBOX = Uri.parse("content://sms");

private SmsObserver smsObserver;

private Button deleteButton;

private SmsAdapter adapter;

private final static String SMS_MESSAGE="newSmsInfo";

// private List newSmsInfo=new ArrayList();

// public ArrayList note;

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

// setTitle(R.string.title);//

setContentView(R.layout.app_login);

showNote=(ListView)findViewById(R.id.showList);

smsInfos=getSmsFromPhone();

//檢測返回的列表長度是否一致

// final int count=smsInfos.size();

smsObserver = new SmsObserver(this, smsHandler);

getContentResolver().registerContentObserver(SMS_INBOX, true, smsObserver);

adapter=new SmsAdapter(this);

showNote.setAdapter(adapter);

deleteButton=(Button)findViewById(R.id.delete);

deleteButton.setOnClickListener(new View.OnClickListener() {

@Override

public void onClick(View v) {

//返回列表長度

int position=smsInfos.size();

int count=position;

//從零計數

position=position-1;

while (position>=0) {

String id = smsInfos.get(position).getId();

//通過協議讀取mmssms.db ，不能直接讀取

Uri deleteUri = Uri.parse("content://sms");

getContentResolver().delete(deleteUri, "sms._id=?", new String[]{id});

smsInfos.remove(position);

position = position - 1;

}

// SmsAdapter adapter=new SmsAdapter(MainActivity.this);

// //刷新列表

//

// showNote.setAdapter(adapter);

//通知數據改變

// adapter.notifyDataSetChanged();

adapter.notifyDataSetChanged();

Toast.makeText(MainActivity.this,"刪除了"+count+"條信息!",Toast.LENGTH_SHORT).show();

}

});

}

private List smsInfos=new ArrayList();

//讀取短信數據庫mmssms.db 的基本表sms 並返回查找的字段

public List getSmsFromPhone() {

ContentResolver cr = getContentResolver();

List smsInfoList=new ArrayList();

//查詢字段

String []projection=new String []{"address","person","body","_id"};

Cursor cur = cr.query(SMS_INBOX, projection, null, null, "date desc");

if (cur!=null){

while (cur.moveToNext()) {

String number = cur.getString(cur.getColumnIndex("address"));//手機號

String name = cur.getString(cur.getColumnIndex("person"));//聯系人姓名列表

String body = cur.getString(cur.getColumnIndex("body"));//信息

String id=cur.getString(cur.getColumnIndex("_id"));

// 過濾條件為密碼或驗證碼

Pattern pattern=Pattern.compile(".*(驗證碼|密碼).*");

Matcher matcher=pattern.matcher(body);

if (matcher.matches()){

SmsInfo smsInfo = new SmsInfo();

smsInfo.setName(name);

smsInfo.setAddress(number);

smsInfo.setText(body);

smsInfo.setId(id);

smsInfoList.add(smsInfo);

}

}

cur.close();

}

// }

return smsInfoList;

}

Handler smsHandler=new Handler();

// {

// @Override

// public void handleMessage(Message msg) {

// super.handleMessage(msg);

// if (msg.what==1){

// SmsAdapter smsAdapter=new SmsAdapter(MainActivity.this);

// showNote.setAdapter(smsAdapter);

// smsAdapter.notifyDataSetChanged();

//

//

// }

// }

// };

public class SmsObserver extends ContentObserver {

private Context context;

private Handler handler;

// private final static int SMS_MESSAGE=1;

public SmsObserver(Context context, android.os.Handler handler) {

super(handler);

this.context=context;

this.handler=handler;

}

@Override

public void onChange(boolean selfChange) {

super.onChange(selfChange);

//每當有新短信到來時，使用我們獲取短消息的方法

smsInfos=getSmsFromPhone();

adapter.notifyDataSetChanged();

//如何判斷是否private message?

Toast.makeText(MainActivity.this,"There have a new message!",Toast.LENGTH_SHORT).show();

// Message message=new Message();

// message.what=1;

// message.obj=newSmsInfo;

// handler.sendMessage(message);

Log.i(SMS_MESSAGE,"correct");

}

}

class SmsAdapter extends BaseAdapter{

// private View mView;/

private LayoutInflater layoutInflater=getLayoutInflater();

public SmsAdapter(Context context){

layoutInflater=LayoutInflater.from(context);

}

@Override

public int getCount() {

return smsInfos.size();

}

@Override

public Object getItem(int position) {

return smsInfos.get(position);

}

@Override

public long getItemId(int position) {

return 0;

}

@Override

public View getView(int position, View convertView, ViewGroup parent) {

//

ViewHolder viewHolder;

if (convertView==null){

convertView=layoutInflater.inflate(R.layout.item,null);

viewHolder=new ViewHolder();

viewHolder.name=(TextView)convertView.findViewById(R.id.name);

viewHolder.address=(TextView)convertView.findViewById(R.id.address);

viewHolder.text=(TextView)convertView.findViewById(R.id.text);

viewHolder.id=(TextView)convertView.findViewById(R.id.id);

convertView.setTag(viewHolder);

}viewHolder=(ViewHolder)convertView.getTag();

viewHolder.name.setText(smsInfos.get(position).getName());

viewHolder.address.setText(smsInfos.get(position).getAddress());

viewHolder.text.setText(smsInfos.get(position).getText());

viewHolder.id.setText(smsInfos.get(position).getId());

return convertView;

}

public final class ViewHolder{

public TextView name;

public TextView address;

public TextView text;

public TextView id;

}

}

}

SmsInfo.class:

?public class SmsInfo {

private String name;

private String address;

private String text;

private String id;

public String getId() {

return id;

}

public void setId(String id) {

this.id = id;

}

public String getName() {

return name;

}

public String getText() {

return text;

}

public String getAddress() {

return address;

}

public void setAddress(String address) {

this.address = address;

}

public void setText(String text) {

this.text = text;

}

public void setName(String name) {

this.name = name;

}

}