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Code Issues Pull Requests Releases Wiki Activity

added background; categorized messages

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Shembull
2020-01-20 13:01:41 +01:00
parent 0dd831f921
commit 855491fc69
9 changed files with 43 additions and 15 deletions
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19
app/src/main/java/com/example/recyclerview/MainActivity.java
View File

@@ -8,6 +8,7 @@ import android.os.Bundle;
import android.os.Handler; import android.os.Handler;
import android.view.View; import android.view.View;
import android.widget.AdapterView; import android.widget.AdapterView;
import android.widget.Toast;
import java.util.ArrayList; import java.util.ArrayList;
import java.util.Date; import java.util.Date;
@@ -22,20 +23,22 @@ public class MainActivity extends AppCompatActivity implements Runnable, Adapter
super.onCreate(savedInstanceState); super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main); setContentView(R.layout.activity_main);
mData = new ArrayList<>(); mData = new ArrayList<>();
mData.add(new Message("Niklas", "Eine super duper Nachricht", new Date())); mData.add(new Message("Niklas", "Eine super duper Nachricht", new Date(), MessageType.OWN_MESSAGE));
mData.add(new Message("Joel", "Eine super Nachricht", new Date())); mData.add(new Message("Joel", "Eine super Nachricht", new Date(), MessageType.RECIEVED_MESSAGE));
mData.add(new Message("Max", "Eine Nachricht", new Date())); mData.add(new Message("Max", "Eine Nachricht", new Date(), MessageType.RECIEVED_MESSAGE));
myAdapter = new MyAdapter(mData); myAdapter = new MyAdapter(mData);
RecyclerView mRecyclerView = findViewById(R.id.recyclerView); RecyclerView mRecyclerView = findViewById(R.id.recyclerView);
mRecyclerView.addOnItemTouchListener( mRecyclerView.addOnItemTouchListener(
new RecyclerItemClickListener(getApplicationContext(), mRecyclerView ,new RecyclerItemClickListener.OnItemClickListener() { new RecyclerItemClickListener(getApplicationContext(), mRecyclerView ,new RecyclerItemClickListener.OnItemClickListener() {
@Override public void onItemClick(View view, int position) { @Override public void onItemClick(View view, int position) {
System.out.println("clicked " + mData.get(position).sender); Toast.makeText(getApplicationContext(), "clicked " + mData.get(position).sender, Toast.LENGTH_SHORT).show();
} }
@Override public void onLongItemClick(View view, int position) { @Override public void onLongItemClick(View view, int position) {
// do whatever Toast.makeText(getApplicationContext(), "deleted " + mData.get(position).sender, Toast.LENGTH_SHORT).show();
mData.remove(position);
myAdapter.notifyDataSetChanged();
} }
}) })
); );
@@ -51,13 +54,13 @@ public class MainActivity extends AppCompatActivity implements Runnable, Adapter
int randNr = (int) Math.floor(Math.random() * 3); int randNr = (int) Math.floor(Math.random() * 3);
switch (randNr){ switch (randNr){
case 0: case 0:
mData.add(new Message("Niklas", "Eine super duper Nachricht", new Date())); mData.add(new Message("Niklas", "Eine super duper Nachricht", new Date(), MessageType.OWN_MESSAGE));
break; break;
case 1: case 1:
mData.add(new Message("Joel", "Eine super Nachricht", new Date())); mData.add(new Message("Joel", "Eine super Nachricht", new Date(), MessageType.RECIEVED_MESSAGE));
break; break;
case 2: case 2:
mData.add(new Message("Max", "Eine Nachricht", new Date())); mData.add(new Message("Max", "Eine Nachricht", new Date(), MessageType.RECIEVED_MESSAGE));
} }
myAdapter.notifyDataSetChanged(); myAdapter.notifyDataSetChanged();
mHandler.postDelayed(this, 1000); mHandler.postDelayed(this, 1000);

4
app/src/main/java/com/example/recyclerview/Message.java
View File

@@ -6,10 +6,12 @@ class Message {
String sender; String sender;
String text; String text;
Date date; Date date;
MessageType mMType;
Message(String aSender, String aText, Date aDate) { Message(String aSender, String aText, Date aDate, MessageType aMType) {
sender = aSender; sender = aSender;
text = aText; text = aText;
date = aDate; date = aDate;
mMType = aMType;
} }
} }

6
app/src/main/java/com/example/recyclerview/MessageType.java Normal file
View File

@@ -0,0 +1,6 @@
package com.example.recyclerview;
public enum MessageType {
OWN_MESSAGE,
RECIEVED_MESSAGE;
}

10
app/src/main/java/com/example/recyclerview/MyAdapter.java
View File

@@ -1,6 +1,5 @@
package com.example.recyclerview; package com.example.recyclerview;
import android.util.Log;
import android.view.LayoutInflater; import android.view.LayoutInflater;
import android.view.View; import android.view.View;
import android.view.ViewGroup; import android.view.ViewGroup;
@@ -13,15 +12,18 @@ import java.util.ArrayList;
public class MyAdapter extends RecyclerView.Adapter<RecyclerView.ViewHolder> { public class MyAdapter extends RecyclerView.Adapter<RecyclerView.ViewHolder> {
ArrayList<Message> mData; private ArrayList<Message> mData;
public MyAdapter(ArrayList<Message> aData) { MyAdapter(ArrayList<Message> aData) {
mData = aData; mData = aData;
} }
@Override @Override
public int getItemViewType(int position) { public int getItemViewType(int position) {
return position % 2; if (mData.get(position).mMType == MessageType.OWN_MESSAGE) {
return 1;
}
return 0;
} }
@NonNull @NonNull

5
app/src/main/res/drawable/rectangle_blue.xml Normal file
View File

@@ -0,0 +1,5 @@
<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android" android:shape="rectangle" >
<solid android:color="@android:color/holo_blue_dark" />
<stroke android:width="1dip" android:color="#4fa5d5"/>
</shape>

5
app/src/main/res/drawable/rectangle_green.xml Normal file
View File

@@ -0,0 +1,5 @@
<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android" android:shape="rectangle" >
<solid android:color="@android:color/holo_green_dark" />
<stroke android:width="1dip" android:color="#4fa5d5"/>
</shape>

5
app/src/main/res/layout/activity_main.xml
View File

@@ -8,8 +8,9 @@
<androidx.recyclerview.widget.RecyclerView <androidx.recyclerview.widget.RecyclerView
android:id="@+id/recyclerView" android:id="@+id/recyclerView"
android:layout_width="409dp" android:layout_width="match_parent"
android:layout_height="729dp" android:layout_height="match_parent"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintStart_toStartOf="parent" app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent" /> app:layout_constraintTop_toTopOf="parent" />
</androidx.constraintlayout.widget.ConstraintLayout> </androidx.constraintlayout.widget.ConstraintLayout>

2
app/src/main/res/layout/message_layout_left.xml
View File

@@ -4,7 +4,9 @@
android:layout_width="match_parent" android:layout_width="match_parent"
android:layout_height="100dp" android:layout_height="100dp"
android:layout_marginLeft="10dp" android:layout_marginLeft="10dp"
android:layout_marginTop="10dp"
android:layout_marginRight="150dp" android:layout_marginRight="150dp"
android:background="@drawable/rectangle_green"
android:orientation="vertical"> android:orientation="vertical">
<TextView <TextView

2
app/src/main/res/layout/message_layout_right.xml
View File

@@ -4,7 +4,9 @@
android:layout_width="match_parent" android:layout_width="match_parent"
android:layout_height="100dp" android:layout_height="100dp"
android:layout_marginLeft="150dp" android:layout_marginLeft="150dp"
android:layout_marginTop="10dp"
android:layout_marginRight="10dp" android:layout_marginRight="10dp"
android:background="@drawable/rectangle_blue"
android:orientation="vertical"> android:orientation="vertical">
<TextView <TextView