Android从零搭建项目01 -BaseActivity

• 依赖引入

    implementation 'com.google.code.gson:gson:2.8.0'
    implementation 'com.squareup.okhttp3:okhttp:3.4.1'
    implementation 'com.squareup.retrofit2:retrofit:2.3.0'
    implementation 'io.reactivex.rxjava2:rxandroid:2.0.1'
    implementation 'io.reactivex.rxjava2:rxjava:2.1.5'
    //ConverterFactory的String依赖包
    implementation 'com.squareup.retrofit2:converter-scalars:2.3.0'
    //ConverterFactory的Gson依赖包
    implementation 'com.squareup.retrofit2:converter-gson:2.3.0'
    //CallAdapterFactory的Rx依赖包
    implementation 'com.squareup.retrofit2:adapter-rxjava2:2.3.0'
    implementation 'com.jakewharton:butterknife:8.4.0'
    annotationProcessor  'com.jakewharton:butterknife-compiler:8.4.0'
    implementation 'com.android.support:recyclerview-v7:28.0.0-alpha1'
    implementation 'com.android.support:design:28.0.0-alpha1'

greendao butterknife的引入还需再项目的gradle加入

 classpath 'com.jakewharton:butterknife-gradle-plugin:8.8.1'
 classpath 'org.greenrobot:greendao-gradle-plugin:3.2.1'

• 1 设置沉浸式状态栏

 //沉浸式
    implementation 'com.jaeger.statusbarutil:library:1.5.1'

在baseActivity中

 StatusBarUtil.setColor(this, getResources().getColor(R.color.colorPrimary));

• 2 创建一个activity 管理类 AppActivityManager 管理activity 在oncreate 加入 onDestroy移出

public class AppActivityManager {
    private static Stack<Activity> mActivityStack;
    private static AppActivityManager mAppManager;

    private AppActivityManager() {
    }

    /**
     * 单一实例
     */
    public static AppActivityManager getInstance() {
        if (mAppManager == null) {
            mAppManager = new AppActivityManager();
        }
        return mAppManager;
    }

    /**
     * 添加Activity到堆栈
     */
    public void addActivity(Activity activity) {
        if (mActivityStack == null) {
            mActivityStack = new Stack<Activity>();
        }
        mActivityStack.add(activity);
    }
    /**
     * 移除Activity到堆外
     */
    public void removeActivity(Activity activity) {
        mActivityStack.remove(activity);
    }

    /**
     * 获取栈顶Activity
     */
    public Activity getTopActivity() {
        return mActivityStack.lastElement();
    }

    /**
     * 结束栈顶Activity
     */
    public void killTopActivity() {
        Activity activity = mActivityStack.lastElement();
        killActivity(activity);
    }

    /**
     * 结束指定的Activity
     */
    private void killActivity(Activity activity) {
        if (activity != null) {
            mActivityStack.remove(activity);
            activity.finish();
        }
    }

    /**
     * 结束指定类名的Activity
     */
    public void killActivity(Class<?> cls) {
        for (Activity activity : mActivityStack) {
            if (activity.getClass().equals(cls)) {
                killActivity(activity);
            }
        }
    }

    /**
     * 结束所有Activity
     */
    private void killAllActivity() {
        for (int i = 0, size = mActivityStack.size(); i < size; i++) {
            if (null != mActivityStack.get(i)) {
                mActivityStack.get(i).finish();
            }
        }
        mActivityStack.clear();
    }

    /**
     * 退出应用程序
     */
    @SuppressWarnings("deprecation")
    public void AppExit(Context context) {
        try {
            killAllActivity();
            android.app.ActivityManager activityMgr = (android.app.ActivityManager) context
                    .getSystemService(Context.ACTIVITY_SERVICE);
            activityMgr.restartPackage(context.getPackageName());
            System.exit(0);
        } catch (Exception e) {
            Log.e("AppActivityManager",""+e);
        }
    }
}

• 3打开activity 的动画 在res 目录下创建anim 文件

anim_slide_in_left.xml
<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android">
    <translate android:fromXDelta="-100%p" android:toXDelta="0%"
               android:duration="@android:integer/config_mediumAnimTime"/>
    <alpha android:fromAlpha="0.0" android:toAlpha="1.0"
           android:duration="@android:integer/config_mediumAnimTime" />
</set>

anim_slide_in_right.xml
<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android">
    <translate android:fromXDelta="100%p" android:toXDelta="0"
               android:duration="@android:integer/config_mediumAnimTime"/>
    <alpha android:fromAlpha="0.0" android:toAlpha="1.0"
           android:duration="@android:integer/config_mediumAnimTime" />
</set>


anim_slide_out_right.xml
<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android">
    <translate android:fromXDelta="0%p" android:toXDelta="100%"
               android:duration="@android:integer/config_mediumAnimTime"/>
    <alpha android:fromAlpha="1.0" android:toAlpha="0"
           android:duration="@android:integer/config_mediumAnimTime" />
</set>


anim_slide_out_left.xm
<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android">
    <translate android:fromXDelta="0%p" android:toXDelta="-100%"
               android:duration="@android:integer/config_mediumAnimTime"/>
    <alpha android:fromAlpha="1.0" android:toAlpha="0"
           android:duration="@android:integer/config_mediumAnimTime" />
</set>



  @Override
    public void startActivity(Intent intent) {
        super.startActivity(intent);
        overridePendingTransition(R.anim.anim_slide_in_right,R.anim.anim_slide_out_left);
    }

    @Override
    public void startActivityForResult(Intent intent, int requestCode) {
        super.startActivityForResult(intent, requestCode);
        overridePendingTransition(R.anim.anim_slide_in_right,R.anim.anim_slide_out_left);
    }

    protected void openActivity(Class clazz){
        Intent intent = new Intent(this,clazz);
        startActivity(intent);
    }

    @Override
    public void finish() {
        super.finish();

        overridePendingTransition(R.anim.anim_slide_in_left,R.anim.anim_slide_out_right);
    }

• 4完整BaseActivity

public abstract class BaseActivity  extends AppCompatActivity{
    @Override
    protected void onCreate(@Nullable Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(getLayoutId());
        ButterKnife.bind(this) ;
        setStatusBar();
        initView();
        initData();
        AppActivityManager.getInstance().addActivity(this);
    }

    private void setStatusBar() {
        StatusBarUtil.setColor(this, getResources().getColor(R.color.colorPrimary));
    }


    /**
     * 初始化view
     */
    protected abstract void initView();


    /**
     * 布局ID
     * @return
     */
    protected  abstract int getLayoutId();

    /**
     * 初始化数据
     */
    protected void initData(){}




    @Override
    public void startActivity(Intent intent) {
        super.startActivity(intent);
        overridePendingTransition(R.anim.anim_slide_in_right,R.anim.anim_slide_out_left);
    }

    @Override
    public void startActivityForResult(Intent intent, int requestCode) {
        super.startActivityForResult(intent, requestCode);
        overridePendingTransition(R.anim.anim_slide_in_right,R.anim.anim_slide_out_left);
    }

    protected void openActivity(Class clazz){
        Intent intent = new Intent(this,clazz);
        startActivity(intent);
    }

    @Override
    public void finish() {
        super.finish();

        overridePendingTransition(R.anim.anim_slide_in_left,R.anim.anim_slide_out_right);
    }


    @Override
    protected void onDestroy() {
        AppActivityManager.getInstance().removeActivity(this);
        super.onDestroy();
    }


    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        switch (item.getItemId()) {
            case android.R.id.home:
                this.finish();
                return true;
        }

        return super.onOptionsItemSelected(item);
    }

}