长按某黑名单电话之后，弹出一上下文对话框，进行修改或者删除操作。

首先在res文件下创建menu文件夹，然后创建一个xml文件：contextmenu，用于创建上下文对话框的样式。

android:id="@+id/update_number"

android:title="更改黑名单号码">

android:id="@+id/delete_number"

android:title="删除黑名单号码">

然后给某一个view对象注册上下文菜单：

registerForContextMenu(lv_call_sms_safe);

接着重写上下文对话框的两个方法：onCreateContextMenu和onContextItemSelected

public void onCreateContextMenu(ContextMenu menu, View v,

ContextMenuInfo menuinfo) {

super.onCreateContextMenu(menu, v, menuinfo);

MenuInflater inflater = getMenuInflater();

inflater.inflate(R.menu.contextmenu, menu);

}

@Override

public boolean onContextItemSelected(MenuItem item) {

// TODO Auto-generated method stub

AdapterContextMenuInfo info = (AdapterContextMenuInfo) item

.getMenuInfo();

int id = (int) info.id;

String number = numbers.get(id);

switch (item.getItemId()) {

case R.id.update_number:

updateNumber(number);

break;

case R.id.delete_number:

dao.delete(number);

numbers = dao.getnumbers();

adapter.notifyDataSetChanged();

break;

}

return false;

}最后实现updatenumber方法：

private void updateNumber(final String oldnumber) {

AlertDialog.Builder builder = new Builder(CallSmsActivity.this);

builder.setTitle("更新黑名单号码");

final EditText et = new EditText(CallSmsActivity.this);

et.setInputType(InputType.TYPE_CLASS_PHONE);

builder.setView(et);

builder.setPositiveButton("确定", new DialogInterface.OnClickListener() {

@Override

public void onClick(DialogInterface dialog, int which) {

String newnumber = et.getText().toString().trim();

if (TextUtils.isEmpty(newnumber)) {

Toast.makeText(getApplicationContext(), "号码不能为空", 1);

return;

} else {

dao.update(oldnumber, newnumber);

numbers = dao.getnumbers();

adapter.notifyDataSetChanged();

}

// TODO Auto-generated method stub

}

});

builder.setNegativeButton("取消", new DialogInterface.OnClickListener() {

@Override

public void onClick(DialogInterface dialog, int which) {

// TODO Auto-generated method stub

// return;

}

});

builder.create().show();

}