如何覆盖按钮显示主页

Question

默认情况下，按钮(setDisplayHomeAsUpEnabled(返回父活动，我将如何更改它？例如：我需要返回到意向

toolbar = (Toolbar) findViewById(R.id.tb_dados);
toolbar.setTitle("Adicione uma descrição");
setSupportActionBar(toolbar);
getSupportActionBar().setDisplayHomeAsUpEnabled(true);

Answer 1

你可以试试这个....

@Override
public boolean onOptionsItemSelected(MenuItem item)
{
switch (item.getItemId())
{
case android.R.id.home:
// your intent code here.
break;
}
return super.onOptionsItemSelected(item);
}

Answer 2

如果需要，您可以使用onOptionsItemSelected方法并执行任何其他功能

@Override
public boolean onOptionsItemSelected(MenuItem item) {
if (item.getItemId() == android.R.id.home) {
Toast.makeText(this, "back Button Clicked", Toast.LENGTH_SHORT).show();
return true;
}
return super.onOptionsItemSelected(item);
}

Answer 3

由于您使用的是自定义工具栏，因此您可以像这样轻松使用自定义工具栏

toolbar.setNavigationIcon(R.drawable.back_arrow);// use your back arrow image
toolbar.setNavigationOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
startActivity(new Intent(this,MainActivity.class));//call which activity you want in back press
finish();
}
});