我想将我的MainActivity中的ImageView实际添加到另一个xml文件(layout.xml),我试过这段代码,但它不起作用,这里是Mainactivity的代码源,activity_main.xml和layout.xml:
主要活动:
let groupedData = _.groupBy(data, access_log => { return moment .utc(access_log.last_access_at) .local() .format("YYYY-MM-DD"); });
这里是主要活动的xml文件 activity_main.xml中:
public class MainActivity extends AppCompatActivity {
LinearLayout linearLayout;
ImageView imageView;
Dialog dialog;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
imageView = new ImageView(this);
linearLayout = (LinearLayout)findViewById(R.id.id_layout);
imageView.setImageResource(R.drawable.ic_launcher_background);
linearLayout.addView(imageView);
dialog = new Dialog(this);
dialog.setContentView(linearLayout);
dialog.show();
}}
这里是xml文件的代码源 layout.xml:
<android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context="sofware.dz.test.MainActivity">
</android.support.constraint.ConstraintLayout>
答案 0 :(得分:1)
看起来你并没有在layout.xml
任何地方充气。
您可以替换
行linearLayout = (LinearLayout)findViewById(R.id.id_layout);
用这个:
linearLayout = (LinearLayout)LayoutInflater.from((Context) this).inflate(R.layout.layout, null)
您可以将线性布局引用的膨胀视图作为xml的根视图引用。如果你有其他东西作为根,那么你必须在最后添加findViewById(R.id.id_layout)
电话。
答案 1 :(得分:1)
如果您尝试使用Dialog
中定义的布局创建layout.xml
作为内容视图,请在活动中添加ImageView
,请尝试以下操作:< / p>
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
imageView = new ImageView(this);
imageView.setImageResource(R.drawable.ic_launcher_background);
dialog = new Dialog(this);
dialog.setContentView(R.layout.layout); // this inflates layout.xml in the dialog
LinearLayout layout = dialog.findViewById(R.id.id_layout); // grab root view from inflated layout
layout.addView(imageView);
dialog.show(); // show the dialog, which now contains the ImageView
}
这是如何工作的,一步一步:
设置您正在执行的活动的内容视图:
setContentView(R.layout.activity_main);
创建您要添加的ImageView
(您也已经这样做了):
imageView = new ImageView(this);
imageView.setImageResource(R.drawable.ic_launcher_background);
创建对话框,并将其内容视图设置为layout.xml布局的资源ID(使其膨胀):
dialog = new Dialog(this);
dialog.setContentView(R.layout.layout); // this inflates layout.xml in the dialog
LinearLayout layout = dialog.findViewById(R.id.id_layout); // grab root view
layout.addView(imageView);
layout.addView(imageView);