マッチョなActivityサンプル

package net.yanzm.profileapplication;

import android.animation.Animator;
import android.animation.AnimatorListenerAdapter;
import android.animation.AnimatorSet;
import android.animation.ObjectAnimator;
import android.app.Activity;
import android.app.AlertDialog;
import android.content.DialogInterface;
import android.content.Intent;
import android.graphics.Bitmap;
import android.net.Uri;
import android.os.AsyncTask;
import android.os.Bundle;
import android.provider.MediaStore;
import android.support.annotation.IntDef;
import android.support.annotation.NonNull;
import android.text.TextUtils;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.MenuItem;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.ImageView;
import android.widget.LinearLayout;
import android.widget.RadioGroup;
import android.widget.Spinner;
import android.widget.TextView;
import android.widget.Toast;

import com.squareup.picasso.Picasso;

import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.util.ArrayList;
import java.util.List;
import java.util.Random;

public class MainActivity extends Activity {

    private static final int REQUEST_CODE_PICK_IMAGE = 1;

    private ImageView thumbnailView;
    private EditText nameEditText;
    private EditText bioEditText;
    private Spinner experienceSpinner;
    private RadioGroup eventGroup;
    private LinearLayout dessertContainer;
    private Button sendButton;

    private View progressView;
    private View profileContainer;

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

        assert getActionBar() != null;
        getActionBar().setDisplayHomeAsUpEnabled(true);

        // ビューの設定
        progressView = findViewById(R.id.progress);
        profileContainer = findViewById(R.id.profile_container);

        thumbnailView = (ImageView) findViewById(R.id.thumbnail);
        thumbnailView.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Intent intent = new Intent(Intent.ACTION_OPEN_DOCUMENT);
                intent.addCategory(Intent.CATEGORY_OPENABLE);
                intent.setType("image/*");
                startActivityForResult(intent, REQUEST_CODE_PICK_IMAGE);
            }
        });

        nameEditText = (EditText) findViewById(R.id.name);
        experienceSpinner = (Spinner) findViewById(R.id.experience);
        bioEditText = (EditText) findViewById(R.id.bio);
        eventGroup = (RadioGroup) findViewById(R.id.event);
        dessertContainer = (LinearLayout) findViewById(R.id.dessert_container);

        findViewById(R.id.add_dessert_button).setOnClickListener(new View.OnClickListener() {

            @Override
            public void onClick(View v) {
                final String[] desserts = getResources().getStringArray(R.array.desserts);
                new AlertDialog.Builder(MainActivity.this)
                        .setItems(desserts, new DialogInterface.OnClickListener() {
                            @Override
                            public void onClick(DialogInterface dialog, int which) {
                                String item = desserts[which];

                                final int childCount = dessertContainer.getChildCount();
                                for (int i = 0; i < childCount; i++) {
                                    final View child = dessertContainer.getChildAt(i);
                                    String dessert = ((TextView) child).getText().toString();
                                    if (dessert.equals(item)) {
                                        Toast.makeText(MainActivity.this, "すでに選択されています", Toast.LENGTH_SHORT).show();
                                        return;
                                    }
                                }

                                final TextView tv = (TextView) getLayoutInflater()
                                        .inflate(R.layout.dessert_item, dessertContainer, false);
                                tv.setText(desserts[which]);
                                tv.setOnClickListener(new View.OnClickListener() {
                                    @Override
                                    public void onClick(View v) {
                                        new AlertDialog.Builder(MainActivity.this)
                                                .setMessage("削除しますか？")
                                                .setPositiveButton(android.R.string.ok, new DialogInterface.OnClickListener() {
                                                    @Override
                                                    public void onClick(DialogInterface dialog, int which) {
                                                        dessertContainer.removeView(tv);
                                                    }
                                                })
                                                .setNegativeButton(android.R.string.cancel, null)
                                                .show();
                                    }
                                });
                                dessertContainer.addView(tv);
                            }
                        })
                        .show();
            }
        });

        sendButton = (Button) findViewById(R.id.send_button);
        sendButton.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                // バリデーション
                if (validate()) {
                    send();
                }
            }
        });


        // 画面回転対応
        if (savedInstanceState != null) {
            progressView.setVisibility(View.GONE);
            return;
        }

        // プログレスを表示
        progressView.setVisibility(View.VISIBLE);
        // （同期）編集フォームを非表示or無効化
        profileContainer.setVisibility(View.GONE);

        // 1. サーバーからプロフィールデータを取得
        AsyncTask<Void, Void, ProfileData> task = new AsyncTask<Void, Void, ProfileData>() {

            @Override
            protected ProfileData doInBackground(Void... params) {
                return getProfileData();
            }

            @Override
            protected void onPostExecute(ProfileData profileData) {
                // 2. プロフィールデータを表示
                if (!TextUtils.isEmpty(profileData.imageUrl)) {
                    Picasso.with(MainActivity.this).load(profileData.imageUrl).into(thumbnailView);
                }
                nameEditText.setText(profileData.name);
                bioEditText.setText(profileData.bio);
                experienceSpinner.setSelection(profileData.experience);
                int id = -1;
                switch (profileData.eventStatus) {
                    case 0:
                        id = R.id.attend;
                        break;
                    case 1:
                        id = R.id.not_attend;
                        break;
                    case 2:
                        id = R.id.attend;
                        break;
                }
                eventGroup.check(id);

                for (String dessert : profileData.favoriteDessert) {
                    LayoutInflater inflater = getLayoutInflater();
                    final TextView tv = (TextView) inflater.inflate(R.layout.dessert_item, dessertContainer, false);
                    tv.setText(dessert);
                    tv.setOnClickListener(new View.OnClickListener() {
                        @Override
                        public void onClick(View v) {
                            new AlertDialog.Builder(MainActivity.this)
                                    .setMessage("削除しますか？")
                                    .setPositiveButton(android.R.string.ok, new DialogInterface.OnClickListener() {
                                        @Override
                                        public void onClick(DialogInterface dialog, int which) {
                                            dessertContainer.removeView(tv);
                                        }
                                    })
                                    .setNegativeButton(android.R.string.cancel, null)
                                    .show();
                        }
                    });
                    dessertContainer.addView(tv);
                }

                // 編集フォームを表示or有効化
                profileContainer.setVisibility(View.VISIBLE);
                final AnimatorSet animatorSet = new AnimatorSet();
                animatorSet.playTogether(
                        ObjectAnimator.ofFloat(profileContainer, "alpha", 0f, 1f),
                        ObjectAnimator.ofFloat(progressView, "alpha", 1f, 0f)
                );
                animatorSet.addListener(new AnimatorListenerAdapter() {
                    @Override
                    public void onAnimationEnd(Animator animation) {
                        super.onAnimationEnd(animation);
                        animatorSet.removeListener(this);
                        // プログレスを非表示
                        progressView.setVisibility(View.GONE);
                    }
                });
                animatorSet.start();
            }
        }.execute();
    }

    private static final String KEY_IMAGE_URI = "image_uri";
    private static final String KEY_DESSERT_LIST = "dessert_list";

    @Override
    protected void onSaveInstanceState(Bundle outState) {
        super.onSaveInstanceState(outState);
        Uri uri = (Uri) thumbnailView.getTag();
        if (uri != null) {
            outState.putString(KEY_IMAGE_URI, uri.toString());
        }

        ArrayList<String> dessertList = new ArrayList<>();
        final int childCount = dessertContainer.getChildCount();
        for (int i = 0; i < childCount; i++) {
            final View child = dessertContainer.getChildAt(i);
            if (child instanceof TextView) {
                dessertList.add(((TextView) child).getText().toString());
            }
        }
        outState.putStringArrayList(KEY_DESSERT_LIST, dessertList);
    }

    @Override
    protected void onRestoreInstanceState(@NonNull Bundle savedInstanceState) {
        super.onRestoreInstanceState(savedInstanceState);
        final String uriString = savedInstanceState.getString(KEY_IMAGE_URI);
        if (!TextUtils.isEmpty(uriString)) {
            Uri uri = Uri.parse(uriString);
            getContentResolver().takePersistableUriPermission(uri, Intent.FLAG_GRANT_READ_URI_PERMISSION);
            try {
                Bitmap bmp = MediaStore.Images.Media.getBitmap(getContentResolver(), uri);
                thumbnailView.setImageBitmap(bmp);
                thumbnailView.setTag(uri);
            } catch (Exception e) {
                e.printStackTrace();
            }
        }

        ArrayList<String> dessertList = savedInstanceState.getStringArrayList(KEY_DESSERT_LIST);
        for (String dessert : dessertList) {
            LayoutInflater inflater = getLayoutInflater();
            final TextView tv = (TextView) inflater.inflate(R.layout.dessert_item, dessertContainer, false);
            tv.setText(dessert);
            tv.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View v) {
                    new AlertDialog.Builder(MainActivity.this)
                            .setMessage("削除しますか？")
                            .setPositiveButton(android.R.string.ok, new DialogInterface.OnClickListener() {
                                @Override
                                public void onClick(DialogInterface dialog, int which) {
                                    dessertContainer.removeView(tv);
                                }
                            })
                            .setNegativeButton(android.R.string.cancel, null)
                            .show();
                }
            });
            dessertContainer.addView(tv);
        }
    }

    private boolean validate() {
        // バリデーション失敗: エラーメッセージ表示
        final String name = nameEditText.getText().toString();
        if (TextUtils.isEmpty(name)) {
            Toast.makeText(MainActivity.this, "名前が入力されていません", Toast.LENGTH_SHORT).show();
            return false;
        }

        final int id = eventGroup.getCheckedRadioButtonId();
        if (id != R.id.attend && id != R.id.not_attend && id != R.id.unknown) {
            Toast.makeText(MainActivity.this, "DroidKaigiが選択されていません", Toast.LENGTH_SHORT).show();
            return false;
        }

        return true;
    }

    private void send() {
        final Uri imageUri = (Uri) thumbnailView.getTag();
        final ProfileData profileData = new ProfileData();
        profileData.name = nameEditText.getText().toString();
        profileData.bio = bioEditText.getText().toString();

        final int position = experienceSpinner.getSelectedItemPosition();
        switch (position) {
            case 0:
                profileData.experience = ProfileData.EXPERIENCE_U1;
                break;
            case 1:
                profileData.experience = ProfileData.EXPERIENCE_U2;
                break;
            case 2:
                profileData.experience = ProfileData.EXPERIENCE_U3;
                break;
            case 3:
                profileData.experience = ProfileData.EXPERIENCE_U4;
                break;
            case 4:
                profileData.experience = ProfileData.EXPERIENCE_U5;
                break;
            case 5:
                profileData.experience = ProfileData.EXPERIENCE_O5;
                break;
            default:
                return;
        }

        final int id = eventGroup.getCheckedRadioButtonId();
        switch (id) {
            case R.id.attend:
                profileData.eventStatus = ProfileData.EVENT_STATUS_ATTEND;
                break;
            case R.id.not_attend:
                profileData.eventStatus = ProfileData.EVENT_STATUS_NOT_ATTEND;
                break;
            case R.id.unknown:
                profileData.eventStatus = ProfileData.EVENT_STATUS_UNKNOWN;
                break;
            default:
                return;
        }

        List<String> favoriteDessert = new ArrayList<>();
        final int childCount = dessertContainer.getChildCount();
        for (int i = 0; i < childCount; i++) {
            final View child = dessertContainer.getChildAt(i);
            if (child instanceof TextView) {
                favoriteDessert.add(((TextView) child).getText().toString());
            }
        }
        profileData.favoriteDessert = favoriteDessert;


        // 送信ボタン無効化
        sendButton.setEnabled(false);

        // プログレスを表示
        progressView.setVisibility(View.VISIBLE);
        progressView.animate().alpha(1f);

        // 5. データの更新をサーバーに送信
        AsyncTask<Void, Void, Boolean> task = new AsyncTask<Void, Void, Boolean>() {

            @Override
            protected Boolean doInBackground(Void... params) {
                if (imageUri != null) {
                    String imageUrl = sendImage(imageUri);
                    if (TextUtils.isEmpty(imageUrl)) {
                        return false;
                    }
                    profileData.imageUrl = imageUrl;
                }

                return sendProfileData(profileData);
            }

            @Override
            protected void onPostExecute(Boolean result) {
                if (isFinishing()) {
                    return;
                }

                if (result) {
                    Toast.makeText(MainActivity.this, "更新しました", Toast.LENGTH_SHORT).show();
                    finish();

                } else {
                    Toast.makeText(MainActivity.this, "更新できませんでした", Toast.LENGTH_SHORT).show();
                    // 送信ボタン有効化
                    sendButton.setEnabled(true);

                    final ObjectAnimator animator = ObjectAnimator.ofFloat(progressView, "alpha", 1f, 0f);
                    animator.addListener(new AnimatorListenerAdapter() {
                        @Override
                        public void onAnimationEnd(Animator animation) {
                            super.onAnimationEnd(animation);
                            animator.removeListener(this);
                            // プログレスを非表示
                            progressView.setVisibility(View.GONE);
                        }
                    });
                    animator.start();
                }
            }
        }.execute();
    }

    private String sendImage(Uri imageUri) {
        // ネットワーク通信をダミーするためにスリープ
        try {
            Thread.sleep(3000);
        } catch (InterruptedException e) {
            e.printStackTrace();
        }

        return "https://pbs.twimg.com/profile_images/542953617108398081/Gs_eKy2k.jpeg";
    }

    Random random = new Random();

    private ProfileData getProfileData() {
        // ネットワーク通信をダミーするためにスリープ
        try {
            Thread.sleep(3000);
        } catch (InterruptedException e) {
            e.printStackTrace();
        }

        ProfileData profileData = new ProfileData();
        profileData.name = random.nextBoolean() ? "Droid" : "";
        if (!TextUtils.isEmpty(profileData.name)) {
            profileData.imageUrl = "https://dl.dropboxusercontent.com/u/7053182/ic_yanzm.jpeg";
            profileData.bio = random.nextBoolean() ? "世界をまたにかけるAndroid開発者" : "";

            int experience = random.nextInt(6); // 0 〜 5;
            switch (experience) {
                case 0:
                    profileData.experience = ProfileData.EXPERIENCE_U1;
                    break;
                case 1:
                    profileData.experience = ProfileData.EXPERIENCE_U2;
                    break;
                case 2:
                    profileData.experience = ProfileData.EXPERIENCE_U3;
                    break;
                case 3:
                    profileData.experience = ProfileData.EXPERIENCE_U4;
                    break;
                case 4:
                    profileData.experience = ProfileData.EXPERIENCE_U5;
                    break;
                case 5:
                    profileData.experience = ProfileData.EXPERIENCE_O5;
                    break;
            }

            int eventStatus = random.nextInt(3); // 0 〜 2;
            switch (eventStatus) {
                case 0:
                    profileData.eventStatus = ProfileData.EVENT_STATUS_ATTEND;
                    break;
                case 1:
                    profileData.eventStatus = ProfileData.EVENT_STATUS_NOT_ATTEND;
                    break;
                case 2:
                    profileData.eventStatus = ProfileData.EVENT_STATUS_UNKNOWN;
                    break;
            }

            final String[] desserts = getResources().getStringArray(R.array.desserts);
            int start = random.nextInt(desserts.length);
            int size = random.nextInt(desserts.length);

            List<String> favoriteDessert = new ArrayList<>();
            for (int i = start; i < start + size && i < desserts.length; i++) {
                favoriteDessert.add(desserts[i]);
            }
            profileData.favoriteDessert = favoriteDessert;
        }

        return profileData;
    }

    private boolean sendProfileData(ProfileData profileData) {
        // ネットワーク通信をダミーするためにスリープ
        try {
            Thread.sleep(3000);
        } catch (InterruptedException e) {
            e.printStackTrace();
        }

        return random.nextBoolean();
    }

    public static class ProfileData {

        @Retention(RetentionPolicy.SOURCE)
        @IntDef({EVENT_STATUS_ATTEND, EVENT_STATUS_NOT_ATTEND, EVENT_STATUS_UNKNOWN})
        public @interface EventStatus {
        }

        public static final int EVENT_STATUS_ATTEND = 0;
        public static final int EVENT_STATUS_NOT_ATTEND = 1;
        public static final int EVENT_STATUS_UNKNOWN = 2;

        @Retention(RetentionPolicy.SOURCE)
        @IntDef({EXPERIENCE_U1, EXPERIENCE_U2, EXPERIENCE_U3, EXPERIENCE_U4, EXPERIENCE_U5, EXPERIENCE_O5})
        public @interface Experience {
        }

        public static final int EXPERIENCE_U1 = 0;
        public static final int EXPERIENCE_U2 = 1;
        public static final int EXPERIENCE_U3 = 2;
        public static final int EXPERIENCE_U4 = 3;
        public static final int EXPERIENCE_U5 = 4;
        public static final int EXPERIENCE_O5 = 5;

        String imageUrl;
        String name;
        String bio;
        @Experience
        int experience = 0;
        @EventStatus
        int eventStatus = -1;
        List<String> favoriteDessert = new ArrayList<>();
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        if (item.getItemId() == android.R.id.home) {
            finish();
            return true;
        }
        return super.onOptionsItemSelected(item);
    }

    @Override
    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
        if (requestCode == REQUEST_CODE_PICK_IMAGE) {
            if (resultCode != RESULT_OK) {
                return;
            }
            final Uri uri = data.getData();
            getContentResolver().takePersistableUriPermission(uri, Intent.FLAG_GRANT_READ_URI_PERMISSION);
            try {
                Bitmap bmp = MediaStore.Images.Media.getBitmap(getContentResolver(), uri);
                thumbnailView.setImageBitmap(bmp);
                thumbnailView.setTag(uri);
            } catch (Exception e) {
                e.printStackTrace();
            }
            return;
        }
        super.onActivityResult(requestCode, resultCode, data);
    }
}