Question

我有两个Activity activity1和activity2，activity1有两个按钮，button1和button2。当点击button1它应链接到activity2应该在Action-bar中有标题＆＃34; am button1＆＃34;当点击button2时，它再次链接到activity2，它应该在Action-bar中有标题＆＃34; am button2＆＃34;。

当button1点击Activity1时，它应该通过put-extra of intent传递数据并更改活动action-bar title has＆＃34; am button1＆＃34;。
Activity2应该从activity1接收数据并更改其中的操作栏。

任何人都可以帮我这样做。

Answer 1

活动1类

public class ActivityOne extends Activity{

Button btnOne, btnTwo;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);

    btnOne = (Button) findViewById(R.id.btnOne);
    btnOne.setOnClickListener(new View.OnClickListener() {

        @Override
        public void onClick(View arg0) {
            Intent intent = new Intent(ActivityOne.this, ActivityTwo.class);
            intent.putExtra("title", "am Button1");
            startActivity(intent);

        }
    });

    btnTwo = (Button) findViewById(R.id.btnTwo);
    btnOne.setOnClickListener(new View.OnClickListener() {

        @Override
        public void onClick(View arg0) {
            Intent intent = new Intent(ActivityOne.this, ActivityTwo.class);
            intent.putExtra("title", "am Button2");
            startActivity(intent);

        }
    });
}
}

ActivityTwo类

public class ActivityTwo extends Activity{

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);

    Intent intent = getIntent();
    String title = intent.getStringExtra("title");

    getActionBar().setTitle(title);
}

}

Answer 2

这是您的解决方案

活动1：点击任意按钮1

Intent intent=new Intent(this,ActivityTwo.class);
intent.putExtra("title", "M button 1");
startActivity(intent);

活动1：点击任意按钮1

Intent intent=new Intent(this,ActivityTwo.class);
intent.putExtra("title", "M button 2");
startActivity(intent);

现在开始活动2：

String title=getIntent().getStringExtra("title");
getActionBar().setTitle(title);

或

String title=getIntent().getStringExtra("title");
getSupportActionBar().setTitle(title);

Answer 3

在第一项活动中

Intent mIntent;   
     @Override
            public void onClick(View v) {

                    mIntent = new Intent(FirstActivity.this,SecondActivity.class);
                    switch (v.getId()) {
                    case R.id.first_btn:
                        mIntent.putExtra("buttonClicked", "Am Button One");
                        break;
                    case R.id.second_btn:
                        mIntent.putExtra("buttonClicked", "Am Button Second ");
                        break;}
                        startActivity(mIntent);}

        //and in the second activity  write:
            private String mSelectedButton;
        @Override
            protected void onCreate(Bundle savedInstanceState) {
                super.onCreate(savedInstanceState);
                setContentView(R.layout.activity_web_view);
                mSelectedButton = getIntent().getIntExtra("buttonClicked", "");
            }

然后使用变量mSelectedButton来设置标题

Answer 4

在清单文件中声明您的第二个活动时，请将您的所需名称设置为标签：

<activity
        android:name="your second activity"
        android:label="@string/your 2nd activity name" >
    </activity>

单击按钮更改操作栏标题

4 个答案: