我有一个注册应用程序正在制作用户注册数据，另一端数据可以显示和查看和操作，我使用共享首选项方法，如下所示写入和访问数据（你可以看到它们在DataEntry.java＆amp; DataManipulation.java中显示如下）但我想使用内容提供程序方法来操作数据，如查询或插入或删除....有没有办法做到这一点，如果是的，请你告诉我怎么样？
谢谢
以下是以下代码
用户端DataEntry.java：
package com.hossa.datamanipulation;
import android.app.Activity;
import android.content.Intent;
import android.content.SharedPreferences;
import android.os.Bundle;
import android.view.Menu;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;
import android.widget.Toast;
public class DataEntry extends Activity {
/*
* here is the part the user will submit several data for several people
*/
Button Submit, BroadcastButton;
TextView User, Email, Mobile;
EditText UserEdit, EmailEdit, MobileEdit;
String UserValue, EmailValue, MobileValue;
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.dataentry);
Submit = (Button) findViewById(R.id.DataSubmit);
BroadcastButton = (Button) findViewById(R.id.Broadcast);
User = (TextView) findViewById(R.id.TVuser);
Email = (TextView) findViewById(R.id.TVemail);
Mobile = (TextView) findViewById(R.id.TVmobile);
UserEdit = (EditText) findViewById(R.id.Edituser);
EmailEdit = (EditText) findViewById(R.id.Editemail);
MobileEdit = (EditText) findViewById(R.id.Editmobile);
Submit.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
// saving the data of the user//
SharedPreferences sp = getSharedPreferences("userdata",
MODE_PRIVATE);// name of the file and it's mode//
SharedPreferences.Editor edit = sp.edit();// to be able to edit
// the file//
edit.putString("Username", UserEdit.getText().toString());// get
// the
// input
// username//
edit.putString("Email", EmailEdit.getText().toString());// get
// the
// input
// Email//
edit.putString("Mobile", MobileEdit.getText().toString());// get
// the
// input
// Mobile//
edit.commit();
Toast.makeText(getApplicationContext(),
"Data is Saved Successfully", Toast.LENGTH_SHORT)
.show();
}
});
BroadcastButton.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
Intent e = new Intent();
e.setAction("com.hossa.data" + "manipulation.custombroadcast");
sendBroadcast(e);
}
});
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
}
和另一端DataManipulaton.java：
import android.app.Activity;
import android.content.ContentResolver;
import android.content.Context;
import android.content.SharedPreferences;
import android.database.Cursor;
import android.net.Uri;
import android.os.Bundle;
import android.view.Menu;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;
import android.widget.Toast;
public class DataManipulation extends Activity {
Button ImportButton, ViewButton, RetrieveButton;
EditText UserShow;
TextView EmailDisplay, UserDisplay, MobileDisplay, EmailTV, UserTV,
MobileTV;
public static final String defaultvalue = "N/A";
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.datamanipulation);
ContentResolver ct = getContentResolver();
String Path = "data/data/com.hossa.datamanipulation/files/userdata";
Uri uri = Uri.parse("content://" + Path);
ImportButton = (Button) findViewById(R.id.ImportButton);
ViewButton = (Button) findViewById(R.id.ViewButton);
RetrieveButton = (Button) findViewById(R.id.RetrieveButton);
EmailDisplay = (TextView) findViewById(R.id.EmailDisplay);
MobileDisplay = (TextView) findViewById(R.id.MobileDisplay);
UserDisplay = (TextView) findViewById(R.id.UsernameDisplay);
EmailTV = (TextView) findViewById(R.id.EmailTV2);
UserTV = (TextView) findViewById(R.id.UserTV2);
MobileTV = (TextView) findViewById(R.id.MobileTV2);
final String U1[] = new String[10];
final String E1[] = new String[10];
final String M1[] = new String[10];
final String[][] alldata = new String[][] { U1, M1, E1 };
RetrieveButton.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
int i = 0;
SharedPreferences spdata = getSharedPreferences("userdata",
Context.MODE_PRIVATE);
while (spdata.getString("Username", defaultvalue) != null) {
String tempuser = spdata
.getString("Username", defaultvalue);
U1[i] = tempuser;
i++;
}
i = 0;
while (spdata.getString("Email", defaultvalue) != null) {
String tempemail = spdata.getString("Email", defaultvalue);
E1[i] = tempemail;
i++;
}
i = 0;
while (spdata.getString("Mobile", defaultvalue) != null) {
String tempmobile = spdata
.getString("Mobile", defaultvalue);
M1[i] = tempmobile;
i++;
}
i = 0;
}
});
ImportButton.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
getApplicationContext();
// TODO Auto-generated method stub
SharedPreferences sp = getSharedPreferences("userdata",
Context.MODE_PRIVATE);
String Username = sp.getString("Username", defaultvalue);
String Email = sp.getString("Email", defaultvalue);
String Mobile = sp.getString("Mobile", defaultvalue);
// what if there is no data from the user??//
if (Username.equals(defaultvalue) || Email.equals(defaultvalue)
|| Mobile.equals(defaultvalue)) {
Toast.makeText(getApplicationContext(),
"no data has been entered", Toast.LENGTH_SHORT)
.show();
} else {
UserTV.setText(Username);
EmailTV.setText(Email);
MobileTV.setText(Mobile);
}
}
});
//THE BELOW IS THE SECTION I NEED HELP WITH...THE ABOVE IS SIMPLY SOME TRIALS AND TESTS//
Cursor c = ct.query(uri, U1, null, null, null);
// c=ct.delete(uri, where, selectionArgs);
// c=ct.update(uri, values, where, selectionArgs);
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
}
请注意，两个类别都在相同的包装中，因此它是相同的应用程序而不是2个不同的应用程序