[英]Open new activity and/or Fragment using DrawerList Menu
因此,我遵循了一个实现侧面菜单的教程(菜单从左侧滑入),一切正常,但是我不确定如何使菜单可用。 我想在单击按钮时开始一个新的活动或片段。 现在它显示了4个字符串(Android,IOS,Windows,OS X,Linux),但是当我单击它们时,什么都没有发生?
任何帮助将是巨大的! 谢谢。
private void addDrawerItems() {
String[] osArray = { "Android", "iOS", "Windows", "OS X", "Linux" };
mAdapter = new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1, osArray);
mDrawerList.setAdapter(mAdapter);
}
private void setupDrawer() {
mDrawerToggle = new ActionBarDrawerToggle(this, mDrawerLayout,
R.string.drawer_open, R.string.drawer_close) {
/** Called when a drawer has settled in a completely open state. */
public void onDrawerOpened(View drawerView) {
super.onDrawerOpened(drawerView);
getSupportActionBar().setTitle("Navigation!");
invalidateOptionsMenu(); // creates call to onPrepareOptionsMenu()
}
/** Called when a drawer has settled in a completely closed state. */
public void onDrawerClosed(View view) {
super.onDrawerClosed(view);
getSupportActionBar().setTitle(mActivityTitle);
invalidateOptionsMenu(); // creates call to onPrepareOptionsMenu()
}
};
mDrawerToggle.setDrawerIndicatorEnabled(true);
mDrawerLayout.setDrawerListener(mDrawerToggle);
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
//noinspection SimplifiableIfStatement
if (mDrawerToggle.onOptionsItemSelected(item)) {
return true;
}
return super.onOptionsItemSelected(item);
}
我也相信这行代码是我可以进行更改以使其成为可能的地方?
mDrawerList.setOnItemClickListener(new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
Toast.makeText(MainActivity.this, "Time for an upgrade!", Toast.LENGTH_SHORT).show();
}
});
如果您的onItemClickListener正常工作,则可以使用position int检测要启动的Activity。
如果您将osArray设置为实例变量,那么您应该能够使用
String title = osArray[position];
您可以执行一系列的if / else if / else语句来选择一个Activity:
if (position == 0) {
// Launch first activity
}
else if (position == 1) {
// Launch second activity
}
else {
// Launch an activity if not in position 0 or 1
}
您需要向mDrawerList的侦听器添加一些代码(您的最后一个片段)。
Intent intent = new Intent(MainActivity.this, NewActivity.class);
startActivity(intent);
此代码将启动一个新的Activity,将NewActivity
替换为您要启动的活动的名称,并将MainActivity
替换为当前活动的名称。 确保保留.this
和.class
扩展名。
因此,您的Listener方法看起来与此类似。
mDrawerList.setOnItemClickListener(new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
Toast.makeText(MainActivity.this, "TESTING", Toast.LENGTH_SHORT).show();
Intent intent = new Intent(MainActivity.this, NewActivity.class);
startActivity(intent);
}
});
您可能需要添加一些选择语句来确定要开始的活动。 例如,按下奶酪开始斯蒂尔顿活动。 您可以使用position变量来确定要开始的活动。
if (osArray[position] == 1){
Intent intent = new Intent(MainActivity.this, NewActivityOne.class);
}
if (osArray[position] == 2){
Intent intent = new Intent(MainActivity.this, NewActivityTwo.class);
}
startActivity(intent);
这些答案依赖于osArray被公开,并在类的顶部声明它,以便所有子方法都可以访问它。
尝试这个:
mDrawerList.setOnItemClickListener(new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
switch(position) {
case 0: // Pos (0) of your osArray
startActivity(new Intent(this, AndroidActivity.class));
break
case 1: // Pos (1) of your osArray... etc.
startActivity(new Intent(this, IosActivity.class));
break;
case 2:
startActivity(new Intent(this, WindowsActivity.class));
break;
case 3:
startActivity(new Intent(this, OsxActivity.class));
break;
case 4:
startActivity(new Intent(this, LinuxActivity.class));
break;
default:
Toast.makeText(MainActivity.this, "No such activity.", Toast.LENGTH_SHORT).show();
break;
}
}
});
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