安卓开发入门基础之双向传递延伸java无痕坚守本心的博客-

xml1布局构思

• 总体是一个垂直的线性布局
• 再往里包含1个文本框，1个水平（横向）排列的线性布局
• 水平（横向）排列的线性布局里面放2个按钮

xml2布局构思

• 1个文本框，1个按钮即可

xml3布局构思

• 也是1个文本框，1个按钮即可

Mainactivity.java

• 对代码不懂的话可以参考一下我先前写的安卓开发入门基础之Intent双向传递
• 没有什么变动，基本上就是点击activity内的按钮进行两两相互传值

private String message_to_cpjl = "From Staff : Hello Product manager! What's our tasks?"; private String message_to_laoban = "From Staff : Hello Boss! I feel ill. Can I go on vacation?"; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main);      tocpjl = (TextView) findViewById(R.id.staff);     btnjl = (Button) findViewById(R.id.btntojl);     btnjl.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) {             Intent intent = new Intent(getApplicationContext(),Main2Activity.class);             intent.putExtra("001", message_to_cpjl); startActivityForResult(intent,0x01); } });     btnlb = (Button) findViewById(R.id.btntolb);     btnlb.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) {             Intent intent = new Intent(getApplicationContext(),Main3Activity.class);             intent.putExtra("003",message_to_laoban); startActivityForResult(intent,0x02); } }); } @Override protected void onActivityResult(int requestCode, int resultCode, Intent data) { super.onActivityResult(requestCode, resultCode, data); if(requestCode==0x01){         String extra = data.getStringExtra("002");         tocpjl.setText(extra); } if(requestCode==0x02){         String extra = data.getStringExtra("003");         tocpjl.setText(extra); } }

Mainactivity2.java

private String message_to_staff = "From Product manager : Hello Staff ! We should solve these proplems together."; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main2);     rece = (TextView) findViewById(R.id.recefromyg);     rece.setText(getIntent().getStringExtra("001"));     backbtn = (Button) findViewById(R.id.btntoyg);      backbtn.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) {             Intent intent =new Intent(getApplicationContext(),MainActivity.class);             intent.putExtra("002", message_to_staff); setResult(RESULT_OK,intent); finish(); } });

Mainactivity3.java

private String message_to_staff = "From Boss : Hello Staff ! You can go home right now."; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main3);     rece = (TextView) findViewById(R.id.recefromyg);     rece.setText(getIntent().getStringExtra("003"));     backbtn = (Button) findViewById(R.id.btntoyg);      backbtn.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) {             Intent intent =new Intent(getApplicationContext(),MainActivity.class);             intent.putExtra("003", message_to_staff.toString()); setResult(RESULT_OK,intent); finish(); } });

App设计效果图