Add fragments

Add contact list

app/build.gradle

@@ -1,4 +1,15 @@
+buildscript {
+  repositories {
+    mavenCentral()
+  }
+
+  dependencies {
+    classpath 'me.tatarka:gradle-retrolambda:3.2.3'
+  }
+}
+
 apply plugin: 'com.android.application'
+apply plugin: 'me.tatarka.retrolambda'
 
 android {
   compileSdkVersion 23
@@ -17,11 +28,25 @@ android {
       proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
     }
   }
+  compileOptions {
+    sourceCompatibility JavaVersion.VERSION_1_8
+    targetCompatibility JavaVersion.VERSION_1_8
+  }
 }
 
 dependencies {
   compile fileTree(dir: 'libs', include: ['*.jar'])
   testCompile 'junit:junit:4.12'
   compile 'com.android.support:appcompat-v7:23.1.0'
+  compile 'com.android.support:recyclerview-v7:23.1.0'
   compile 'com.android.support:design:23.1.0'
+
+  compile 'com.squareup.picasso:picasso:2.5.2'
+
+  compile 'com.jakewharton:butterknife:7.0.1'
+}
+
+retrolambda {
+  jdk System.getenv("JAVA_HOME")
+  javaVersion JavaVersion.VERSION_1_7
 }

app/src/main/AndroidManifest.xml

@@ -2,14 +2,16 @@
 <manifest xmlns:android="http://schemas.android.com/apk/res/android"
     package="me.cullycross.test4tabs">
 
+  <uses-permission android:name="android.permission.READ_CONTACTS" />
+
   <application
       android:allowBackup="true"
       android:icon="@mipmap/ic_launcher"
       android:label="@string/app_name"
       android:supportsRtl="true"
       android:theme="@style/AppTheme">
     <activity
-        android:name=".FourTabsActivity"
+        android:name=".activities.FourTabsActivity"
         android:label="@string/app_name"
         android:theme="@style/AppTheme.NoActionBar">
       <intent-filter>

app/src/main/java/me/cullycross/test4tabs/activities/FourTabsActivity.java

@@ -0,0 +1,124 @@
+package me.cullycross.test4tabs.activities;
+
+import android.os.Bundle;
+import android.support.design.widget.FloatingActionButton;
+import android.support.design.widget.Snackbar;
+import android.support.design.widget.TabLayout;
+import android.support.v4.app.Fragment;
+import android.support.v4.app.FragmentManager;
+import android.support.v4.app.FragmentPagerAdapter;
+import android.support.v4.view.ViewPager;
+import android.support.v7.app.AppCompatActivity;
+import android.support.v7.widget.Toolbar;
+import android.view.LayoutInflater;
+import android.view.Menu;
+import android.view.MenuItem;
+import android.view.View;
+import android.view.ViewGroup;
+import android.widget.TextView;
+import butterknife.Bind;
+import butterknife.ButterKnife;
+import me.cullycross.test4tabs.R;
+import me.cullycross.test4tabs.fragments.ContactsFragment;
+import me.cullycross.test4tabs.fragments.DatabaseFragment;
+import me.cullycross.test4tabs.fragments.PicturesFragment;
+import me.cullycross.test4tabs.fragments.SinglePictureFragment;
+
+public class FourTabsActivity extends AppCompatActivity {
+
+  private SectionsPagerAdapter mSectionsPagerAdapter;
+
+
+  @Bind(R.id.toolbar) Toolbar mToolbar;
+  @Bind(R.id.container) ViewPager mViewPager;
+  @Bind(R.id.tabs) TabLayout mTabLayout;
+
+  @Override protected void onCreate(Bundle savedInstanceState) {
+    super.onCreate(savedInstanceState);
+    setContentView(R.layout.activity_four_tabs);
+    ButterKnife.bind(this);
+
+    setSupportActionBar(mToolbar);
+
+    mSectionsPagerAdapter = new SectionsPagerAdapter(getSupportFragmentManager());
+
+    mViewPager.setAdapter(mSectionsPagerAdapter);
+    mTabLayout.setupWithViewPager(mViewPager);
+
+    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();
+      }
+    });
+  }
+
+  @Override public boolean onCreateOptionsMenu(Menu menu) {
+    // Inflate the menu; this adds items to the action bar if it is present.
+    getMenuInflater().inflate(R.menu.menu_four_tabs, 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);
+  }
+
+  public class SectionsPagerAdapter extends FragmentPagerAdapter {
+
+    public static final String CONTACTS = "Contacts";
+    public static final String DATABASE = "Database";
+    public static final String PICTURES = "Pictures";
+    public static final String SINGLE_PICTURE = "Single picture";
+
+    public SectionsPagerAdapter(FragmentManager fm) {
+      super(fm);
+    }
+
+    @Override public Fragment getItem(int position) {
+
+      switch (position) {
+        case 0:
+          return ContactsFragment.newInstance();
+        case 1:
+          return DatabaseFragment.newInstance();
+        case 2:
+          return PicturesFragment.newInstance();
+        case 3:
+          return SinglePictureFragment.newInstance();
+        default:
+          return null;
+      }
+    }
+
+    @Override public int getCount() {
+      return 4;
+    }
+
+    @Override public CharSequence getPageTitle(int position) {
+      switch (position) {
+        case 0:
+          return CONTACTS;
+        case 1:
+          return DATABASE;
+        case 2:
+          return PICTURES;
+        case 3:
+          return SINGLE_PICTURE;
+        default:
+          return null;
+      }
+    }
+  }
+}