从不同的类中获取String数组并将其传递给不同的类

Question

我有三个String数组，其中两个在一个名为Homepage.java的类中，其中一个在Chatss.java中，如下所示 -

Homepage.java代码为 -

package com.md.viyo;
import java.util.HashMap;
import java.util.List;
import java.util.Vector;
import android.app.ActionBar;
import android.content.Context;
import android.content.Intent;
import android.content.SharedPreferences;
import android.database.Cursor;
import android.graphics.Color;
 import android.graphics.drawable.ColorDrawable;
  import android.os.Bundle;
  import android.provider.ContactsContract;
  import android.support.v4.app.Fragment;
  import android.support.v4.app.FragmentActivity;
 import android.support.v4.view.ViewPager;
  import android.view.Menu;
 import android.view.MenuItem;
  import android.view.View;
  import android.widget.TabHost;
   import android.widget.TabHost.TabContentFactory;
import android.widget.TextView;
import android.widget.Toast;

import com.parse.CountCallback;
import com.parse.FindCallback;
import com.parse.Parse;
import com.parse.ParseException;
 import com.parse.ParseObject;
import com.parse.ParseQuery;


public class Homepage extends FragmentActivity implements     TabHost.OnTabChangeListener, ViewPager.OnPageChangeListener {

private TabHost mTabHost;
private ViewPager mViewPager;
private HashMap<String, TabInfo> mapTabInfo = new HashMap<String, Homepage.TabInfo>();
private PagerAdapter mPagerAdapter;
int j=0,i=0;
String[] fetch_name,fetch_num;
SharedPreferences prefs1, prefs, prefs2;
int tottal,ij=0, snumcount=0, snamecount=0, scloudcount=0;
Context mcontext;
/**
 *
 * @author mwho
 * Maintains extrinsic info of a tab's construct
 */
private class TabInfo {
     private String tag;
     private Class<?> clss;
     private Bundle args;
     private Fragment fragment;
     TabInfo(String tag, Class<?> clazz, Bundle args) {
         this.tag = tag;
         this.clss = clazz;
         this.args = args;
     }

}
/**
 * A simple factory that returns dummy views to the Tabhost
 * @author mwho
 */
class TabFactory implements TabContentFactory {

    private final Context mContext;

    /**
     * @param context
     */
    public TabFactory(Context context) {
        mContext = context;
    }

    /** (non-Javadoc)
     * @see android.widget.TabHost.TabContentFactory#createTabContent(java.lang.String)
     */
    public View createTabContent(String tag) {
        View v = new View(mContext);
        v.setMinimumWidth(0);
        v.setMinimumHeight(0);
        return v;
    }

}
/** (non-Javadoc)
 * @see android.support.v4.app.FragmentActivity#onCreate(android.os.Bundle)
 */
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    // Inflate the layout
    setContentView(R.layout.activity_home);
    Parse.initialize(getApplicationContext(), "TUkcv3AsYpCAeZB1R6d5o3HvujUICdv9sqF4nMg5", "vBC4pyACIlwWxRmtqHriAJG2Jk3WFuF0X9bWpGyI");

    // Initialise the TabHost
    ActionBar bar = getActionBar();
    bar.setBackgroundDrawable(new ColorDrawable(Color.parseColor("#ff9911")));
    bar.setIcon(new ColorDrawable(Color.parseColor("#ff9911")));
    //mTabHost.getTabWidget().getChildAt(mTabHost.getCurrentTab()).setBackgroundColor(Color.parseColor("#0000FF"));
   // mTabHost.getTabWidget().getChildAt(mTabHost.getCurrentTab()).getBackground().setColorFilter(Color.RED, PorterDuff.Mode.MULTIPLY);

    this.initialiseTabHost(savedInstanceState);
    if (savedInstanceState != null) {
        mTabHost.setCurrentTabByTag(savedInstanceState.getString("tab")); //set the tab as per the saved state
    }
    // Intialise ViewPager
    this.intialiseViewPager();
    Cursor phones1 = getContentResolver().query(ContactsContract.CommonDataKinds.Phone.CONTENT_URI, null,null,null, null );
    while(phones1.moveToNext())
    {
        j=j+1;
    }

    fetch_name = new String[j];
    fetch_num = new String[j];
    phones1.moveToFirst();
    while(phones1.moveToNext())
    {
        fetch_name[i]= phones1.getString(phones1.getColumnIndex(ContactsContract.CommonDataKinds.Phone.DISPLAY_NAME));
        fetch_num[i] = phones1.getString(phones1.getColumnIndex(ContactsContract.CommonDataKinds.Phone.NUMBER));
        i =i + 1;
    }
    phones1.close();
    Toast.makeText(getApplicationContext(), ""+ fetch_num.length, Toast.LENGTH_LONG).show();

}


/** (non-Javadoc)
 * @see android.support.v4.app.FragmentActivity#onSaveInstanceState(android.os.Bundle)
 */
protected void onSaveInstanceState(Bundle outState) {
    outState.putString("tab", mTabHost.getCurrentTabTag()); //save the tab selected
    super.onSaveInstanceState(outState);
}

/**
 * Initialise ViewPager
 */
private void intialiseViewPager() {

    List<Fragment> fragments = new Vector<Fragment>();
    fragments.add(Fragment.instantiate(this, Callss.class.getName()));
    fragments.add(Fragment.instantiate(this, Chatss.class.getName()));
    fragments.add(Fragment.instantiate(this, Contactss.class.getName()));
    this.mPagerAdapter  = new PagerAdapter(super.getSupportFragmentManager(), fragments);
    //
    this.mViewPager = (ViewPager)super.findViewById(R.id.viewpager);
    this.mViewPager.setAdapter(this.mPagerAdapter);
    this.mViewPager.setOnPageChangeListener(this);
}

/**
 * Initialise the Tab Host
 */
private void initialiseTabHost(Bundle args) {
    mTabHost = (TabHost)findViewById(android.R.id.tabhost);
    mTabHost.setup();
    TabInfo tabInfo = null;
    Homepage.AddTab(this, this.mTabHost, this.mTabHost.newTabSpec("Calls").setIndicator("Calls"), ( tabInfo = new TabInfo("Calls", Callss.class, args)));
    this.mapTabInfo.put(tabInfo.tag, tabInfo);
    Homepage.AddTab(this, this.mTabHost, this.mTabHost.newTabSpec("Chats").setIndicator("Chats"), ( tabInfo = new TabInfo("Chats", Chatss.class, args)));
    this.mapTabInfo.put(tabInfo.tag, tabInfo);
    Homepage.AddTab(this, this.mTabHost, this.mTabHost.newTabSpec("Contacts").setIndicator("Contacts"), ( tabInfo = new TabInfo("Contacts", Contactss.class, args)));
    this.mapTabInfo.put(tabInfo.tag, tabInfo);
    // Default to first tab
    //this.onTabChanged("Tab1");
    //
    for (int i = 0; i < mTabHost.getTabWidget().getChildCount(); i++) {
        //mTabHost.getTabWidget().getChildAt(i).setBackgroundColor(Color.parseColor("#FF0000")); // unselected
        TextView tv = (TextView) mTabHost.getTabWidget().getChildAt(i).findViewById(android.R.id.title); //Unselected Tabs
        tv.setTextColor(Color.parseColor("#ffffff"));
    }
    mTabHost.setOnTabChangedListener(this);
}

/**
 * Add Tab content to the Tabhost
 * @param homepage
 * @param tabHost
 * @param tabSpec
 * @param clss
 * @param args
 */
private static void AddTab(Homepage homepage, TabHost tabHost, TabHost.TabSpec tabSpec, TabInfo tabInfo) {
    // Attach a Tab view factory to the spec
    tabSpec.setContent(homepage.new TabFactory(homepage));
    tabHost.addTab(tabSpec);
}

/** (non-Javadoc)
 * @see android.widget.TabHost.OnTabChangeListener#onTabChanged(java.lang.String)
 */
public void onTabChanged(String tag) {
    //TabInfo newTab = this.mapTabInfo.get(tag);
    int pos = this.mTabHost.getCurrentTab();
    this.mViewPager.setCurrentItem(pos);
}

/* (non-Javadoc)
 * @see android.support.v4.view.ViewPager.OnPageChangeListener#onPageScrolled(int, float, int)
 */
@Override
public void onPageScrolled(int position, float positionOffset,
        int positionOffsetPixels) {
    // TODO Auto-generated method stub

}

/* (non-Javadoc)
 * @see android.support.v4.view.ViewPager.OnPageChangeListener#onPageSelected(int)
 */
@Override
public void onPageSelected(int position) {
    // TODO Auto-generated method stub
    this.mTabHost.setCurrentTab(position);
}

/* (non-Javadoc)
 * @see android.support.v4.view.ViewPager.OnPageChangeListener#onPageScrollStateChanged(int)
 */
@Override
public void onPageScrollStateChanged(int state) {
    // TODO Auto-generated method stub

}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
    // Inflate the menu; this adds items to the action bar if it is present.
    getMenuInflater().inflate(R.menu.items, 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.
    switch (item.getItemId()) {
    case R.id.profile:
        Toast.makeText(getBaseContext(), "You selected Phone", Toast.LENGTH_SHORT).show();
        break;

    default:
        break;
    }

    return super.onOptionsItemSelected(item);
}

}

在上面的代码中，两个String Arrays是＆＃34; fetch_name＆＃34; ＆安培; ＆＃34; fetch_num＆＃34; 现在还有一个字符串数组作为＆＃34; cloud_num＆＃34; 其代码如下 -

package com.md.viyo;

import java.util.List;

import android.content.Context;
import android.content.SharedPreferences;
import android.os.Bundle;
import android.support.annotation.Nullable;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Toast;

import com.parse.CountCallback;
import com.parse.FindCallback;
import com.parse.ParseException;
import com.parse.ParseObject;
import com.parse.ParseQuery;

public class Chatss extends android.support.v4.app.Fragment{
String[] cloud_num;
String sss;
SharedPreferences spref1;
aint ij=0;
@Override

public View onCreateView(LayoutInflater inflater,
        @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
    // TODO Auto-generated method stub
    View v = inflater.inflate(R.layout.fragment_chatss, container, false);
    spref1 = getActivity().getSharedPreferences("con", Context.MODE_APPEND);
    sss = spref1.getString("conno", "nai");
    final ParseObject po = new ParseObject("Register");
    loadone(sss);
    try {
        Thread.sleep(5000);
    } catch (InterruptedException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    }
    loadtwo(sss);
    return v;
}

private void loadone(String sss1) {
    // TODO Auto-generated method stub
    ParseQuery<ParseObject> hue = ParseQuery.getQuery("Register");
    hue.whereNotEqualTo("contact",sss1);
        hue.countInBackground(new CountCallback() {

            @Override
            public void done(int tottal, ParseException arg1) {
                // TODO Auto-generated method stub
                if (arg1!=null){
                    Toast.makeText(getActivity(), "Please try after some time..." , Toast.LENGTH_LONG).show();

                }
                else
                {

                    cloud_num = new String[tottal];

                }
                Toast.makeText(getActivity(), "" + tottal, Toast.LENGTH_LONG).show();

            }

        }); 
        hue.cancel();   
}
private void loadtwo(String sss2) {
    // TODO Auto-generated method stub
    ParseQuery<ParseObject> quee = ParseQuery.getQuery("Register");
    quee.whereNotEqualTo("contact",sss2);
    quee.findInBackground(new FindCallback<ParseObject>() {

        @Override
        public void done(List<ParseObject> oobid, ParseException arg1) {
            // TODO Auto-generated method stub

if (arg1!=null)
{
    Toast.makeText(getActivity(), ""+arg1, Toast.LENGTH_LONG).show();
}
else{

    for(ParseObject register : oobid){
        cloud_num[ij] = register.getString("contact").toString();
        ij=ij+1;
    }

    }
Toast.makeText(getActivity(), "i" + cloud_num.length, Toast.LENGTH_LONG).show();    

        }

    }); 
quee.cancel();
Toast.makeText(getActivity(), "ho gya", Toast.LENGTH_LONG).show();
}
public String[] getcnum()
{
    return(cloud_num);
}

} 我想在另一个名为Contactss.java的类中使用这三个String Arrays值 -

Contactss.java如下 -

    package com.md.viyo;

import android.os.Bundle;
import android.support.annotation.Nullable;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Toast;
public class Contactss extends android.support.v4.app.Fragment 
{
public View onCreateView(LayoutInflater inflater,
        @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
    // TODO Auto-generated method stub
    View v = inflater.inflate(R.layout.fragment_contactss, container, false);
    return v;
}


}

我已经尝试了很多传递String Arrays的方法，但没有任何帮助，请通过提供完整代码来传递String Arrays来帮助我。

Answer 1

您可以使用public Static关键字string arrays并在所需的任何课程中调用

或

<强> SharedPrefernces

将其转换为带有分隔符的字符串并在共享偏好中进行stroing

 StringBuilder sb = new StringBuilder();
    for (int i = 0; i < playlists.length; i++) {
        sb.append(playlists[i]).append(",");
    }
    prefsEditor.putString(PLAYLISTS, sb.toString());

在审核结束时

String[] playlists = playlist.split(",");

Answer 2

在第一类声明这两个方法：

public static String[] fun1(){return fetch_name;}
public static String[] fun2(){return fetch_num;}

同样的方法在第二个类中使用相同的方法签名声明另一个方法。仅按照将要更改函数名称和您返回的String数组变量名称。

public static String() fun3{return cloud_name);

在第三节课中，这样做：

String [] names= Homepage.fun1();
String [] num= Homepage.fun2();
String [] cname= Chatss.fun3();

以上三条线都需要在函数中写入。您可以在类本身中声明String []变量。我希望我足够清楚。如果您有任何疑问，请发表评论。