Question

我有一个全局变量。在应用程序的工作期间，它会更改值。有一个共享按钮，当我点击它时，我只能分享应用程序启动时的值。我想通过shareIntent发送更新的值。怎么做？

private int counter;
...
@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    counterTextView = (TextView) findViewById(R.id.counter_text_view);
    counter++;
    String counterStr = Integer.toString(counter);
    counterTextView.setText(counterStr);
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
    // Inflate menu resource file.
    getMenuInflater().inflate(R.menu.main, menu);

    // Locate MenuItem with ShareActionProvider
    MenuItem item = menu.findItem(R.id.menu_item_share);

    // Fetch and store ShareActionProvider
    mShareActionProvider = (ShareActionProvider) MenuItemCompat.getActionProvider(item);
    setShareIntent(createShareIntent());

    // Return true to display menu
    return true;

}

// Call to update the share intent
private void setShareIntent(Intent shareIntent) {
    if (mShareActionProvider != null) {
        mShareActionProvider.setShareIntent(shareIntent);
    }
}
private Intent createShareIntent() {
    Intent shareIntent = new Intent(Intent.ACTION_SEND);
    shareIntent.setType("text/plain");
    shareIntent.putExtra(Intent.EXTRA_TEXT,
            counter);
    return shareIntent;
}

Answer 1

您可以使用SharedPreferences永久存储数据。

Answer 2

您将常量文本字符串“counter”放入Intent。也许尝试这样的事情：

shareIntent.putExtra("counter", counter);

然后像这样把它拿回来：

int counter = getIntent().getIntExtra("counter", -1);
if (counter != -1) {
    // do stuff
}

如何更新共享意图中的数据？

2 个答案: