如何为我的Android应用程序创建对内部存储文件的共享首选项？
请给我详细的答复。
我想仅通过单击提交按钮将数据保存在内部存储器或应用程序中，并且还希望以后使用这些数据。
这是我的MainActivity.java
package com.example.ananaybatra.securityme;
import android.net.Uri;
import android.os.Bundle;
import android.support.design.widget.FloatingActionButton;
import android.support.design.widget.Snackbar;
import android.util.Log;
import android.view.View;
import android.support.design.widget.NavigationView;
import android.support.v4.view.GravityCompat;
import android.support.v4.widget.DrawerLayout;
import android.support.v7.app.ActionBarDrawerToggle;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.Toolbar;
import android.view.Menu;
import android.view.MenuItem;
import android.widget.Button;
import android.widget.EditText;
import com.google.android.gms.appindexing.Action;
import com.google.android.gms.appindexing.AppIndex;
import com.google.android.gms.appindexing.Thing;
import com.google.android.gms.common.api.GoogleApiClient;
public class MainActivity extends AppCompatActivity
implements NavigationView.OnNavigationItemSelectedListener {
public static final String PREFS_NAME = "MyPrefsFile";
/**
* ATTENTION: This was auto-generated to implement the App Indexing API.
* See https://g.co/AppIndexing/AndroidStudio for more information.
*/
private GoogleApiClient client;
Button mButton;
EditText mEdit;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
mButton = (Button)findViewById(R.id.button);
mEdit = (EditText)findViewById(R.id.Name);
mButton.setOnClickListener(
new View.OnClickListener()
{
public void onClick(View view)
{
Log.v("EditText", mEdit.getText().toString());
}
});
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
FloatingActionButton fab = (FloatingActionButton) findViewById(R.id.fab);
fab.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
Snackbar.make(view, "Replace with your own action", Snackbar.LENGTH_LONG)
.setAction("Action", null).show();
}
});
DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
ActionBarDrawerToggle toggle = new ActionBarDrawerToggle(
this, drawer, toolbar, R.string.navigation_drawer_open, R.string.navigation_drawer_close);
drawer.setDrawerListener(toggle);
toggle.syncState();
NavigationView navigationView = (NavigationView) findViewById(R.id.nav_view);
navigationView.setNavigationItemSelectedListener(this);
// ATTENTION: This was auto-generated to implement the App Indexing API.
// See https://g.co/AppIndexing/AndroidStudio for more information.
client = new GoogleApiClient.Builder(this).addApi(AppIndex.API).build();
}
@Override
public void onBackPressed() {
DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
if (drawer.isDrawerOpen(GravityCompat.START)) {
drawer.closeDrawer(GravityCompat.START);
} else {
super.onBackPressed();
}
}
@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;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
//noinspection SimplifiableIfStatement
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
@SuppressWarnings("StatementWithEmptyBody")
@Override
public boolean onNavigationItemSelected(MenuItem item) {
// Handle navigation view item clicks here.
int id = item.getItemId();
if (id == R.id.nav_camera) {
// Handle the camera action
} else if (id == R.id.nav_gallery) {
} else if (id == R.id.nav_slideshow) {
} else if (id == R.id.nav_manage) {
} else if (id == R.id.nav_share) {
} else if (id == R.id.nav_send) {
}
DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
drawer.closeDrawer(GravityCompat.START);
return true;
}
/**
* ATTENTION: This was auto-generated to implement the App Indexing API.
* See https://g.co/AppIndexing/AndroidStudio for more information.
*/
public Action getIndexApiAction() {
Thing object = new Thing.Builder()
.setName("Main Page") // TODO: Define a title for the content shown.
// TODO: Make sure this auto-generated URL is correct.
.setUrl(Uri.parse("http://[ENTER-YOUR-URL-HERE]"))
.build();
return new Action.Builder(Action.TYPE_VIEW)
.setObject(object)
.setActionStatus(Action.STATUS_TYPE_COMPLETED)
.build();
}
@Override
public void onStart() {
super.onStart();
// ATTENTION: This was auto-generated to implement the App Indexing API.
// See https://g.co/AppIndexing/AndroidStudio for more information.
client.connect();
AppIndex.AppIndexApi.start(client, getIndexApiAction());
}
@Override
public void onStop() {
super.onStop();
// ATTENTION: This was auto-generated to implement the App Indexing API.
// See https://g.co/AppIndexing/AndroidStudio for more information.
AppIndex.AppIndexApi.end(client, getIndexApiAction());
client.disconnect();
}
}
这是我的content_main.xml：
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:id="@+id/content_main"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
android:paddingBottom="@dimen/activity_vertical_margin"
app:layout_behavior="@string/appbar_scrolling_view_behavior"
tools:showIn="@layout/app_bar_main"
tools:context="com.example.ananaybatra.securityme.MainActivity">
<TextView
android:text="Enter Name"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentTop="true"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true"
android:layout_marginTop="18dp"
android:id="@+id/textView4"
android:textAppearance="@style/TextAppearance.AppCompat.Body2" />
<EditText
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:inputType="textPersonName"
android:ems="10"
android:layout_below="@+id/textView4"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true"
android:id="@+id/Name" />
<TextView
android:text="Enter Phone Number"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="@+id/Name"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true"
android:id="@+id/textView5"
android:textAppearance="@style/TextAppearance.AppCompat.Body2" />
<EditText
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:inputType="phone"
android:ems="10"
android:layout_below="@+id/textView5"
android:layout_alignRight="@+id/Name"
android:layout_alignEnd="@+id/Name"
android:id="@+id/PhoneNumber" />
<TextView
android:text="Enter Emergency Contact Number"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="@+id/PhoneNumber"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true"
android:id="@+id/textView6"
android:textAppearance="@style/TextAppearance.AppCompat.Body2" />
<EditText
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:inputType="phone"
android:ems="10"
android:layout_below="@+id/textView6"
android:layout_alignRight="@+id/textView6"
android:layout_alignEnd="@+id/textView6"
android:id="@+id/EmergencyContact" />
<Button
android:text="SUBMIT"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="@+id/Submit"
android:layout_alignParentBottom="true"
android:layout_toRightOf="@+id/textView5"
android:layout_toEndOf="@+id/textView5"
android:layout_marginBottom="99dp" />
<TextView
android:text="Enter Email ID"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="@+id/textView7"
android:textAppearance="@style/TextAppearance.AppCompat.Body2"
android:layout_below="@+id/EmergencyContact"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true" />
<EditText
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:inputType="textEmailAddress"
android:ems="10"
android:layout_centerVertical="true"
android:layout_alignRight="@+id/EmergencyContact"
android:layout_alignEnd="@+id/EmergencyContact"
android:id="@+id/EmailID" />
<TextView
android:text="App Coded by Ananay Batra."
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:layout_centerHorizontal="true"
android:id="@+id/textView2" />
</RelativeLayout>
最佳答案
有关要真正执行的操作以及将对象保存在内部存储器中的信息，请参考https://developer.android.com/guide/topics/data/data-storage.html#filesInternal。
JSONObject jsonObject = new JSONObject();
jsonObject.put("name", nameValue);
jsonObject.put("phoneNumber", phoneNumberValue);
jsonObject.put("emergencyPhoneNumber", emergencyPhoneNumberValue);
jsonObject.put("email", emailValue);
writeFile(context, String.format("%s/%s", context.getFilesDir(), "File name"), jsonObject.toString());
public static void writeFile(Context context, String filePath, String content) throws IOException {
FileWriter writer = new FileWriter(filePath, false);
writer.write(content);
writer.close();
}