xml 阳光首选项设置（第1部分）

Posted 2021-05-16

package com.example.android.sunshine;

import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.view.MenuItem;

// COMPLETED (1) Add new Activity called SettingsActivity using Android Studio wizard
/**
 * Loads the SettingsFragment and handles the proper behavior of the up button.
 */
public class SettingsActivity extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        this.setContentView(R.layout.activity_settings);
        // COMPLETED (2) Set setDisplayHomeAsUpEnabled to true on the support ActionBar
        this.getSupportActionBar().setDisplayHomeAsUpEnabled(true);
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        int id = item.getItemId();
        if (id == android.R.id.home) {
            onBackPressed();
        }

        return super.onOptionsItemSelected(item);
    }
}

package com.example.android.sunshine;

import android.content.Intent;
import android.os.Bundle;
import android.support.v4.app.ShareCompat;
import android.support.v7.app.AppCompatActivity;
import android.view.Menu;
import android.view.MenuItem;
import android.widget.TextView;

public class DetailActivity extends AppCompatActivity {

    private static final String FORECAST_SHARE_HASHTAG = " #SunshineApp";

    private String mForecast;
    private TextView mWeatherDisplay;

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

        mWeatherDisplay = (TextView) findViewById(R.id.tv_display_weather);

        Intent intentThatStartedThisActivity = getIntent();

        if (intentThatStartedThisActivity != null) {
            if (intentThatStartedThisActivity.hasExtra(Intent.EXTRA_TEXT)) {
                mForecast = intentThatStartedThisActivity.getStringExtra(Intent.EXTRA_TEXT);
                mWeatherDisplay.setText(mForecast);
            }
        }
    }

    /**
     * Uses the ShareCompat Intent builder to create our Forecast intent for sharing. We set the
     * type of content that we are sharing (just regular text), the text itself, and we return the
     * newly created Intent.
     *
     * @return The Intent to use to start our share.
     */
    private Intent createShareForecastIntent() {
        Intent shareIntent = ShareCompat.IntentBuilder.from(this)
                .setType("text/plain")
                .setText(mForecast + FORECAST_SHARE_HASHTAG)
                .getIntent();
        return shareIntent;
    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        getMenuInflater().inflate(R.menu.detail, menu);
        MenuItem menuItem = menu.findItem(R.id.action_share);
        menuItem.setIntent(createShareForecastIntent());
        return true;
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        int id = item.getItemId();

        // COMPLETED (7) Launch SettingsActivity when the Settings option is clicked
        if (id == R.id.action_settings) {
            Intent startSettingsActivity = new Intent(this, SettingsActivity.class);
            startActivity(startSettingsActivity);
            return true;
        }

        return super.onOptionsItemSelected(item);
    }
}

<?xml version="1.0" encoding="utf-8"?>
<manifest
    xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.example.android.sunshine">

    <!-- This permission is necessary in order for Sunshine to perform network access. -->
    <uses-permission android:name="android.permission.INTERNET"/>

    <application
        android:allowBackup="true"
        android:icon="@mipmap/ic_launcher"
        android:label="@string/app_name"
        android:supportsRtl="true"
        android:theme="@style/AppTheme">

        <!-- COMPLETED (8) Change MainActivity's launch mode to singleTop -->
        <activity
            android:name=".MainActivity"
            android:label="@string/app_name"
            android:launchMode="singleTop">
            <intent-filter>
                <action android:name="android.intent.action.MAIN"/>
                <category android:name="android.intent.category.LAUNCHER"/>
            </intent-filter>
        </activity>
        <activity
            android:name=".DetailActivity"
            android:parentActivityName=".MainActivity">
            <meta-data
                android:name="android.support.PARENT_ACTIVITY"
                android:value=".MainActivity"/>
        </activity>
        <activity android:name=".SettingsActivity"/>
    </application>

</manifest>