Question

我有这样的观点：

这是一个Android模块。当我在另一个布局上使用它时：

 <com.example.myapp.MyModuleView
        android:id="+id/test" ...

当我得到引用时，我可以调用MyModuleView类方法。

MyModuleView v = (MyModuleView)findViewById(R.id.test)

当我创建MySeekBarLayout时：

MySeekBarLayout l = new MySeekBarLayout();
l.setProgress(10)

此布局为：

MySeekBarLayout扩展了LinearLayout

当我将此视图添加到mymoduleview时：

v.getLayout().addView(l.getLayout())

因此布局已添加到父布局中。它的工作很好。

但是当我旋转手机时，MyModuleView的onSaveInstanceState和onRestoreInstanceState已经过了。但是在没有调用onRestoreInstanceState的情况下重新创建了附加的布局。如何保存附加视图的状态？谢谢！

public class MySeekBarView<T> extends TableRow {

    private SeekBar seekBar;
    private TextView seekBarValue;

    public MySeekBarView(Context context, String title) {
        super(context);
        inflate(getContext(), R.layout.layout_seekbar, this);
    }

    @Override
    protected void onViewCreated() {
        seekBar = findViewById(R.id.my_seekbar_input);
        seekBarValue = findViewById(R.id.my_seekbar_value);
        seekBarValue.setText(String.valueOf(seekBar.getProgress()));
    }


}

MyModuleView附加子项：

view是一个MySeekBarView istance！

TableRow tr = new TableRow(getContext());
TextView textView = (TextView) factory.inflate(R.layout.textview_layout, null);
textView.setText("Test:");
tr.addView(textView);
tr.addView(view, new TableRow.LayoutParams(0, TableRow.LayoutParams.WRAP_CONTENT, 1f));
tr.setGravity(Gravity.CENTER_VERTICAL);
table.addView(tr);

Answer 1

您可以覆盖Car方法并通过这种方式处理更改

Car

Answer 2

将这些方法添加到自定义视图代码中。

static class SavedState extends BaseSavedState {
        int progress;

        SavedState(Parcelable superState) {
            super(superState);
        }

        private SavedState(Parcel in) {
            super(in);
            progress = in.readInt();
        }

        @Override
        public void writeToParcel(Parcel out, int flags) {
            super.writeToParcel(out, flags);
            out.writeInt(progress);
        }

        public static final Parcelable.Creator<SavedState> CREATOR
                = new Parcelable.Creator<SavedState>() {
            public SavedState createFromParcel(Parcel in) {
                return new SavedState(in);
            }

            public SavedState[] newArray(int size) {
                return new SavedState[size];
            }
        };
    }

    @Override
    public Parcelable onSaveInstanceState() {
        Parcelable superState = super.onSaveInstanceState();
        SavedState state = new SavedState(superState);

        //save your view states
        state.progress = mProgress;

        return ss;
    }

    @Override
    public void onRestoreInstanceState(Parcelable state) {
        SavedState ss= (SavedState) state;
        super.onRestoreInstanceState(ss.getSuperState());

        //restore states.
        setProgress(ss.progress);
    }

Answer 3

如果扩展LinearLayout，则需要设置Id，因为android不会调用onsave和onrestore。所以调用setID（uniqeId ++）

Android方向保存布局子状态

3 个答案: