Android 使用清除按钮清除所有 EditText 字段

使用清除按钮清除所有 EditText 字段

xml
    android:id="@+id/btn_clear"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:src="@drawable/ic_clear"
    android:background="@null"
    android:layout_alignParentEnd="true"
    android:layout_marginEnd="16dp"
    android:layout_centerVertical="true" />

java
ImageButton btnClear = findViewById(R.id.btn_clear);
btnClear.setOnClickListener(new View.OnClickListener() {
    @Override
    public void onClick(View v) {
        clearAllEditTextFields();
    }
});

java
private void clearAllEditTextFields() {
    ViewGroup viewGroup = findViewById(android.R.id.content);
    for (int i = 0; i < viewGroup.getChildCount(); i++) {
        View view = viewGroup.getChildAt(i);
        if (view instanceof EditText) {
            ((EditText) view).setText("");
        }
    }
}

xml
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    android:padding="16dp"
    tools:context=".MainActivity">
            android:id="@+id/edit_text1"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:hint="输入文本1" />
            android:id="@+id/edit_text2"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:hint="输入文本2" />
            android:id="@+id/edit_text3"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:hint="输入文本3" />
            android:id="@+id/btn_clear"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:src="@drawable/ic_clear"
        android:background="@null"
        android:layout_marginTop="16dp" />

java
public class MainActivity extends AppCompatActivity {
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        ImageButton btnClear = findViewById(R.id.btn_clear);
        btnClear.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                clearAllEditTextFields();
            }
        });
    }
    private void clearAllEditTextFields() {
        ViewGroup viewGroup = findViewById(android.R.id.content);
        for (int i = 0; i < viewGroup.getChildCount(); i++) {
            View view = viewGroup.getChildAt(i);
            if (view instanceof EditText) {
                ((EditText) view).setText("");
            }
        }
    }
}