'분류 전체보기'에 해당되는 글 256건

* MainActivity.java

public class MainActivity extends AppCompatActivity {

    EditText editText;
    WebView webView;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        editText = findViewById(R.id.editText);
        webView = findViewById(R.id.webView);

        webView.setWebViewClient(new WebViewClient() {
            @Override
            public boolean shouldOverrideUrlLoading(WebView view, WebResourceRequest request) {
                view.loadUrl(request.getUrl().toString());
                return true;
            }
        });

        Button button = findViewById(R.id.button);
        button.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                String url = editText.getText().toString().trim();

                if (url != null && !url.isEmpty()) {
                    webView.loadUrl(url);
                } else {
                    Toast.makeText(getApplicationContext(), "Url을 입력하세요.", Toast.LENGTH_LONG).show();
                }
            }
        });

    }

}

* activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    tools:context=".MainActivity" >

    <EditText
        android:id="@+id/editText"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:ems="10"
        android:inputType="textPersonName"
        android:text="http://m.naver.com" />

    <Button
        android:id="@+id/button"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="열기" />

    <!-- widget -->
    <WebView
        android:id="@+id/webView"
        android:layout_width="match_parent"
        android:layout_height="match_parent" />

</LinearLayout>

* AndroidMenifest.xml

<uses-permission android:name="android.permission.INTERNET" />

<application android:usesCleartextTraffic="true">

* app

minSdkVersion 21

* MainActivity.java

public class MainActivity extends AppCompatActivity {

    TextView textView;

    String[] items = { "mike", "angel", "crow", "test", "sky" };

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        textView = findViewById(R.id.textView);

        Spinner spinner = findViewById(R.id.spinner);
        ArrayAdapter<String> adapter = new ArrayAdapter<String>(this, android.R.layout.simple_spinner_item, items);
        adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
        spinner.setAdapter(adapter);

        spinner.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
            @Override
            public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {
                textView.setText(items[position]);
            }

            @Override
            public void onNothingSelected(AdapterView<?> parent) {
                textView.setText("");
            }
        });
    }

}

* activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    tools:context=".MainActivity">

    <TextView
        android:id="@+id/textView"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="선택된 아이템"
        android:textSize="24sp" />

    <Spinner
        android:id="@+id/spinner"
        android:layout_width="match_parent"
        android:layout_height="wrap_content" />

</LinearLayout>

* activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical"
    android:layout_width="match_parent"
    android:layout_height="match_parent">
    
    <androidx.recyclerview.widget.RecyclerView
        android:id="@+id/recyclerView"
        android:layout_width="match_parent"
        android:layout_height="match_parent" />

</LinearLayout>

* MainActivity.java

public class MainActivity extends AppCompatActivity {

    private DbHelper dbHelper = new DbHelper(this);
    private LibraryHelper libraryHelper = new LibraryHelper();

    private TextView subject;

    private DrawerLayout drawerLayout;
    private MainFragment mainFragment = new MainFragment(this);

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        RecyclerView recyclerView = findViewById(R.id.recyclerView);
        recyclerView.setHasFixedSize(true);

        RecyclerView.LayoutManager layoutManager = new LinearLayoutManager(this);
        recyclerView.setLayoutManager(layoutManager);
        
        ArrayList<Memory> memoryList = dbHelper.memoryList();
        
        MemoryAdapter memoryAdapter = new MemoryAdapter(memoryList);
        recyclerView.setAdapter(memoryAdapter);
	}
    
}

* recycler_item.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:orientation="vertical">

    <TextView
        android:id="@+id/title"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="TextView" />

    <TextView
        android:id="@+id/url"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="TextView" />
    
</LinearLayout>

* MemoryAdapter.java

public class MemoryAdapter extends RecyclerView.Adapter<RecyclerView.ViewHolder> {

    public static class MemoryViewHolder extends RecyclerView.ViewHolder {

        TextView title;
        TextView url;

        MemoryViewHolder(View view) {
            super(view);

            title = view.findViewById(R.id.title);
            url = view.findViewById(R.id.url);
        }

    }

    private ArrayList<Memory> memoryList;

    public MemoryAdapter(ArrayList<Memory> memoryList) {
        this.memoryList = memoryList;
    }

    @NonNull
    @Override
    public RecyclerView.ViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
        View v = LayoutInflater.from(parent.getContext()).inflate(R.layout.recycler_item, parent, false);

        return new MemoryViewHolder(v);
    }

    @Override
    public void onBindViewHolder(@NonNull RecyclerView.ViewHolder holder, int position) {
        MemoryViewHolder memoryViewHolder = (MemoryViewHolder) holder;

        memoryViewHolder.title.setText(memoryList.get(position).getTitle());
        memoryViewHolder.url.setText(memoryList.get(position).getUrl());
    }

    @Override
    public int getItemCount() {
        return memoryList.size();
    }

}

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    tools:context=".MainActivity" >

    <Button
        android:id="@+id/button"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="이미지 변경" />

    <com.example.layout.Layout1
        android:id="@+id/layout1"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="vertical">

    </com.example.layout.Layout1>

</LinearLayout>

* Layout1.java

public class Layout1 extends LinearLayout {

    ImageView imageView;
    TextView textView;
    TextView textView2;

    public Layout1(Context context) {
        super(context);

        init(context);
    }

    public Layout1(Context context, @Nullable AttributeSet attrs) {
        super(context, attrs);

        init(context);
    }

    public void init(Context context) {
        LayoutInflater inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
        inflater.inflate(R.layout.layout1, this, true);

        imageView = findViewById(R.id.imageView);
        textView = findViewById(R.id.textView);
        textView2 = findViewById(R.id.textView2);
    }

    public void setImage(int resId) {
        imageView.setImageResource(resId);
    }

    public void setName(String name) {
        textView.setText(name);
    }

    public void setMobile(String mobile) {
        textView2.setText(mobile);
    }

}

* Layout1.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:orientation="horizontal">

    <!-- CardView는 Palette에서 라이브러리 다운로드 -->
    <androidx.cardview.widget.CardView
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        app:cardBackgroundColor="#FFFFFF"
        app:cardCornerRadius="10dp"
        app:cardElevation="5dp"
        app:cardUseCompatPadding="true">

        <ImageView
            android:id="@+id/imageView"
            android:layout_width="80dp"
            android:layout_height="80dp"
            app:srcCompat="@mipmap/ic_launcher" />

        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:layout_marginLeft="8dp"
            android:orientation="vertical">

            <TextView
                android:id="@+id/textView"
                android:textSize="30dp"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:layout_weight="0"
                android:text="이름" />

            <TextView
                android:id="@+id/textView2"
                android:textSize="30dp"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:layout_weight="0"
                android:text="전화번호" />

        </LinearLayout>

    </androidx.cardview.widget.CardView>

</LinearLayout>

* MainActivity.java

public class MainActivity extends AppCompatActivity {

    Layout1 layout1;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        layout1 = findViewById(R.id.layout1);
        layout1.setImage(R.drawable.ic_launcher_background);
        layout1.setName("홍길동");
        layout1.setMobile("010-1000-1000");

        Button button = findViewById(R.id.button);
        button.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                layout1.setImage(R.drawable.ic_launcher_foreground);
            }
        });
    }
}

* activity_main.xml

* activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".MainActivity">

    <com.example.view.MyButton
        android:id="@+id/textView"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="확인"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent" />

</androidx.constraintlayout.widget.ConstraintLayout>

* MyButton.java

public class MyButton extends AppCompatButton {

    public MyButton(Context context) {
        super(context);

        init(context);
    }

    public MyButton(Context context, AttributeSet attrs) {
        super(context, attrs);

        init(context);
    }

    public void init(Context context) {
        setBackgroundColor(Color.CYAN);
        setTextColor(Color.BLACK);

        float textSize = getResources().getDimension(R.dimen.text_size); // pixel이 기본값이라 sp로 변환
        setTextSize(textSize);
    }

    @Override
    protected void onDraw(Canvas canvas) {
        super.onDraw(canvas);

        Log.d("MyButton", "onDraw 호출됨");
    }

    @Override
    public boolean onTouchEvent(MotionEvent event) {
        Log.d("MyButton", "onTouchEvent 호출됨");

        int action = event.getAction();
        switch (action) {
            case MotionEvent.ACTION_DOWN:
                setBackgroundColor(Color.BLUE);
                setTextColor(Color.RED);
                break;
            case MotionEvent.ACTION_OUTSIDE:
            case MotionEvent.ACTION_CANCEL:
            case MotionEvent.ACTION_UP:
                setBackgroundColor(Color.CYAN);
                setTextSize(Color.BLACK);
                break;
        }

        invalidate();

        return true;
    }

}

* dimens.xml(res > values)

<?xml version="1.0" encoding="utf-8"?>
<resources>
    <dimen name="text_size">30sp</dimen>
</resources>

* Drawable 리소스 이미지에 png 파일을 이미지 확대시 깨짐을 방지하려면 이미지 파일 선택후 우클릭하여 "Create 9-Patch file"을 선택하면 "파일명.9.확장자"로 파일 생성 가능